Merge pull request #302 from elliott10/master

Enable PCI scan and e1000 driver in RISCV
Merge remote-tracking branch 'remotes/origin/master'
2022-05-30 16:29:30 +08:00 · 2022-05-30 16:28:39 +08:00 · 2022-05-30 16:19:19 +08:00 · 2022-05-27 14:21:33 +08:00 · 2022-05-27 13:33:14 +08:00 · 2022-05-26 17:53:58 +08:00
366 changed files with 22626 additions and 11879 deletions
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@ -0,0 +1,16 @@
+[alias]
+xtask = "run --package xtask --release --"
+git-proxy = "xtask git-proxy"
+setup = "xtask setup"
+update-all = "xtask update-all"
+
+check-style = "xtask check-style"
+
+rootfs = "xtask rootfs"
+libc-test = "xtask libc-test"
+other-test = "xtask other-test"
+image = "xtask image"
+
+asm = "xtask asm"
+qemu = "xtask qemu"
+gdb = "xtask gdb"
--- a/.github/scripts/add-doc-index.sh
+++ b/.github/scripts/add-doc-index.sh
@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+cat > target/doc/index.html << EOF
+<html>
+    <head>
+        <meta http-equiv="refresh" content="0;URL=kernel_hal/index.html">
+        <title>Redirection</title>
+    </head>
+    <body onload="window.location = 'kernel_hal/index.html'">
+        <p>Redirecting to <a href="kernel_hal/index.html">kernel_hal/index.html</a>...</p>
+    </body>
+</html>
+EOF
--- a/.github/scripts/install-deps.sh
+++ b/.github/scripts/install-deps.sh
@ -0,0 +1,5 @@
+#!/usr/bin/env bash
+
+sudo apt-get update
+sudo apt-get install -y $@
+pip3 install -r tests/requirements.txt
--- a/.github/scripts/install-qemu.sh
+++ b/.github/scripts/install-qemu.sh
@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+wget https://download.qemu.org/qemu-$1.tar.xz
+tar -xJf qemu-$1.tar.xz
+cd qemu-$1
+./configure --target-list=x86_64-softmmu,riscv64-softmmu
+make -j$nproc > /dev/null 2>&1
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@ -0,0 +1,149 @@
+name: Build CI
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 22 * * *'  # every day at 22:00 UTC
+
+env:
+  rust_toolchain: nightly-2022-01-20
+
+jobs:
+  workspace:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          override: true
+          components: rust-src, rustfmt, clippy
+
+      - name: Check format
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --all-features
+
+      - name: Clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --all-features
+
+      - name: Build docs
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --all-features --no-deps
+
+  build-aarch64:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          override: true
+          target: aarch64-unknown-linux-gnu
+
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          use-cross: true
+          args: --target aarch64-unknown-linux-gnu --workspace --exclude linux-syscall --exclude zcore-loader --exclude zcore
+
+  build-user:
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Pull prebuilt images
+        run: git lfs pull -I prebuilt/zircon/x64/libc.so,prebuilt/zircon/x64/libfdio.so,prebuilt/zircon/x64/libunwind.so,prebuilt/zircon/x64/libzircon.so,prebuilt/zircon/x64/Scrt1.o
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          target: x86_64-fuchsia
+
+      - name: Build Zircon user programs
+        run: cd zircon-user && make build MODE=release
+
+  test-libos:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        mode: [linux, zircon]
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, clippy
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --package zcore --features "${{ matrix.mode }} libos"
+
+      - name: Clippy
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --package zcore --features "${{ matrix.mode }} libos"
+
+  test-bare-metal:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, riscv64]
+        os: [ubuntu-latest, macos-latest]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, clippy
+
+      - uses: actions-rs/install@v0.1
+        with:
+          crate: cargo-binutils
+          version: latest
+
+      - name: Build ${{ matrix.arch }} bare-metal zircon
+        if: matrix.arch == 'x86_64'
+        run: cd zCore && make build  ARCH=${{ matrix.arch }}
+
+      - name: Clippy ${{ matrix.arch }} bare-metal zircon
+        if: matrix.arch == 'x86_64'
+        run: cd zCore && make clippy ARCH=${{ matrix.arch }}
+
+      - name: Build ${{ matrix.arch }} bare-metal linux
+        if: matrix.arch == 'riscv64'
+        run: cd zCore && make build  ARCH=${{ matrix.arch }} LINUX=1
+
+      - name: Clippy ${{ matrix.arch }} bare-metal linux
+        if: matrix.arch == 'riscv64'
+        run: cd zCore && make clippy ARCH=${{ matrix.arch }} LINUX=1
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@ -1,20 +1,28 @@
-name: deploy CI
+name: Deploy docs

-on: 
+on:
  push:
  pull_request:

+env:
+  rust_toolchain: nightly-2022-01-20
+
 jobs:
  doc:
    runs-on: ubuntu-20.04
    steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
+      
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+
      - name: Build docs
-        run: arch=x86_64 cargo doc --no-deps --all-features
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: doc
-#          args: --no-deps --all-features
+        run: |
+          cargo doc --no-deps --all-features
+          .github/scripts/add-doc-index.sh
+
      - name: Deploy to Github Pages
        if: ${{ github.ref == 'refs/heads/master' }}
        uses: JamesIves/github-pages-deploy-action@releases/v3
--- a/.github/workflows/rustc20210727.yml
+++ b/.github/workflows/rustc20210727.yml
@ -1,259 +0,0 @@
-name: current CI
-
-on: 
-  push:
-  pull_request:
-  schedule:
-    - cron: '40 3 * * *'  # every day at 3:40
-
-jobs:
-  check:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          override: true
-          components: rustfmt, clippy
-      - name: Check code format
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
-      - name: Clippy x86_64
-        run: arch=x86_64 cargo clippy
-      - name: Clippy riscv64
-        run: arch=riscv64 cargo clippy
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: clippy
-#x86_64
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04, macos-latest]
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          components: rust-src
-      - name: Build
-        run: arch=x86_64 cargo build
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: build
-      - name: Build zCore
-        run: |
-          cd zCore
-          make build arch=x86_64 
-      # FIX LATER
-      # - name: Build zCore with hypervisor
-      #   run: |
-      #     cd zCore
-      #     make build hypervisor=1
-
-  build-aarch64:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          override: true
-          target: aarch64-unknown-linux-gnu
-      - uses: actions-rs/cargo@v1
-        with:
-          command: build
-          use-cross: true
-          args: -p zircon-loader --target aarch64-unknown-linux-gnu
-
-  build-user:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04, macos-latest]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/zircon/x64/libc.so,prebuilt/zircon/x64/libfdio.so,prebuilt/zircon/x64/libunwind.so,prebuilt/zircon/x64/libzircon.so,prebuilt/zircon/x64/Scrt1.o
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          target: x86_64-fuchsia
-      - name: Build Zircon user programs
-        run: |
-          cd zircon-user
-          make build mode=release
-
-  test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Prepare rootfs
-        run: make rootfs
-      - name: Test
-        run: arch=x86_64 cargo test --all-features --no-fail-fast --workspace --exclude zircon-loader
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: test
-#          args: --all-features --no-fail-fast --workspace --exclude zircon-loader
-        env:
-          CARGO_INCREMENTAL: '0'
-          RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
-          RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
-      - name: Cache grcov
-        uses: actions/cache@v2
-        with:
-          path: ~/.cargo/bin
-          key: ${{ runner.os }}-grcov
-      - name: Gather coverage data
-        id: coverage
-        uses: actions-rs/grcov@v0.1
-#      FIXME: 'error from lcovParse: Failed to parse string'
-#      - name: Coveralls upload
-#        uses: coverallsapp/github-action@master
-#        with:
-#          github-token: ${{ secrets.GITHUB_TOKEN }}
-#          path-to-lcov: ${{ steps.coverage.outputs.report }}
-
-  bench:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Run benchmarks
-        run: arch=x86_64 cargo bench
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: bench
-
-  core-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/zircon/x64/core-tests.zbi,prebuilt/zircon/x64/libzircon.so,prebuilt/zircon/x64/userboot.so
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          components: rust-src
-      - name: Install QEMU
-        run: |
-          sudo apt update
-          sudo apt install qemu-system-x86
-      - name: Build zCore
-        run: |
-          cd zCore
-          make build mode=release
-          cd ..
-      - name: Run core-tests
-        run: |
-          cd scripts
-          pip3 install pexpect
-          python3 core-tests.py
-
-  libc-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Install musl toolchain
-        run: sudo apt-get install musl-tools musl-dev -y
-      - name: Prepare rootfs and libc-test
-        run: make rootfs && make libc-test
-      - name: Build
-        run: arch=x86_64 cargo build --release -p linux-loader
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: build
-#          args: --release -p linux-loader
-      - name: Run libc-tests
-        run: |
-          cd scripts
-          python3 libc-tests.py
-          cat linux/test-result.txt
-
-  doc:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Build docs
-        run: arch=x86_64 cargo doc --no-deps --all-features
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: doc
-#          args: --no-deps --all-features
-#      - name: Deploy to Github Pages
-#        if: ${{ github.ref == 'refs/heads/master' }}
-#        uses: JamesIves/github-pages-deploy-action@releases/v3
-#        with:
-#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#          BRANCH: gh-pages
-#          FOLDER: target/doc
-
-
-  baremetal-libc-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          components: rust-src
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Install musl toolchain qemu-system-x86
-        run: sudo apt-get install musl-tools musl-dev qemu-system-x86 -y
-      - name: Prepare rootfs and libc-test
-        run: make baremetal-test-img
-      - name: Build  kernel
-        run: cd zCore && make build mode=release linux=1 arch=x86_64
-      - name: create qemu disk
-        run: cd zCore && make baremetal-qemu-disk mode=release linux=1 arch=x86_64
-      - name: Run baremetal-libc-test
-        run: |
-          cd scripts
-          python3 ./baremetal-libc-test.py
-  baremetal-rv64-oscomp-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly-2021-07-27
-          components: rust-src
-      - name: Install cargo tools and qemu-system-riscv64
-        run: |
-          sudo apt install qemu-utils
-          cargo install cargo-binutils
-          rustup component add llvm-tools-preview
-          wget https://github.com/rcore-os/qemu-prebuilt/releases/download/5.2.0-riscv64/qemu-system-riscv64.tar.xz > /dev/null
-          tar xJf qemu-system-riscv64.tar.xz && sudo cp qemu-system-riscv64 /usr/local/bin
-          wget https://github.com/rcore-os/qemu-prebuilt/releases/download/qemu-share/qemu-share.tar.xz > /dev/null
-          tar xJf qemu-share.tar.xz && sudo cp -r qemu /usr/local/share/
-      - name: Prepare rootfs and oscomp
-        run: make riscv-image
-      - name: Run baremetal-libc-test
-        run: |
-          cd scripts
-          python3 baremetal-test-riscv64.py
--- a/.github/workflows/rustcnightly.yml
+++ b/.github/workflows/rustcnightly.yml
@ -1,273 +0,0 @@
-name: rustcnightly CI
-
-on: 
-  push:
-  pull_request:
-  schedule:
-    - cron: '40 3 * * *'  # every day at 3:40
-
-jobs:
-  check:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          override: true
-          components: rustfmt, clippy
-      - run: echo "nightly" >rust-toolchain
-      - name: Check code format
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check
-      - name: Clippy x86_64
-        run: arch=x86_64 cargo clippy
-      - name: Clippy riscv64
-        run: arch=riscv64 cargo clippy
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: clippy
-#x86_64
-  build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04, macos-latest]
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          components: rust-src
-      - run: echo "nightly" >rust-toolchain
-      - run: echo "nightly" >./rboot/rust-toolchain
-      - name: Build
-        run: arch=x86_64 cargo build
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: build
-      - name: Build zCore
-        run: |
-          cd zCore
-          make build arch=x86_64 
-      # FIX LATER
-      # - name: Build zCore with hypervisor
-      #   run: |
-      #     cd zCore
-      #     make build hypervisor=1
-
-  build-aarch64:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          override: true
-          target: aarch64-unknown-linux-gnu
-      - run: echo "nightly" >rust-toolchain
-      - uses: actions-rs/cargo@v1
-        with:
-          command: build
-          use-cross: true
-          args: -p zircon-loader --target aarch64-unknown-linux-gnu
-
-  build-user:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      matrix:
-        os: [ubuntu-20.04, macos-latest]
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/zircon/x64/libc.so,prebuilt/zircon/x64/libfdio.so,prebuilt/zircon/x64/libunwind.so,prebuilt/zircon/x64/libzircon.so,prebuilt/zircon/x64/Scrt1.o
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          target: x86_64-fuchsia
-      - run: echo "nightly" >rust-toolchain
-      - name: Build Zircon user programs
-        run: |
-          cd zircon-user
-          make build mode=release
-
-  test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Prepare rootfs
-        run: make rootfs
-      - run: echo "nightly" >rust-toolchain
-      - name: Test
-        run: arch=x86_64 cargo test --all-features --no-fail-fast --workspace --exclude zircon-loader
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: test
-#          args: --all-features --no-fail-fast --workspace --exclude zircon-loader
-        env:
-          CARGO_INCREMENTAL: '0'
-          RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
-          RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
-      - name: Cache grcov
-        uses: actions/cache@v2
-        with:
-          path: ~/.cargo/bin
-          key: ${{ runner.os }}-grcov
-      - name: Gather coverage data
-        id: coverage
-        uses: actions-rs/grcov@v0.1
-#      FIXME: 'error from lcovParse: Failed to parse string'
-#      - name: Coveralls upload
-#        uses: coverallsapp/github-action@master
-#        with:
-#          github-token: ${{ secrets.GITHUB_TOKEN }}
-#          path-to-lcov: ${{ steps.coverage.outputs.report }}
-
-  bench:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Run benchmarks
-        run: arch=x86_64 cargo bench
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: bench
-
-  core-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/zircon/x64/core-tests.zbi,prebuilt/zircon/x64/libzircon.so,prebuilt/zircon/x64/userboot.so
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          components: rust-src
-      - name: Install QEMU
-        run: |
-          sudo apt update
-          sudo apt install qemu-system-x86
-      - run: echo "nightly" >rust-toolchain
-      - run: echo "nightly" >./rboot/rust-toolchain      
-      - name: Build zCore
-        run: |
-          cd zCore
-          make build mode=release
-          cd ..
-      - name: Run core-tests
-        run: |
-          cd scripts
-          pip3 install pexpect
-          python3 core-tests.py
-
-  libc-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Install musl toolchain
-        run: sudo apt-get install musl-tools musl-dev -y
-      - name: Prepare rootfs and libc-test
-        run: make rootfs && make libc-test
-      - run: echo "nightly" >rust-toolchain
-      - name: Build
-        run: arch=x86_64 cargo build --release -p linux-loader
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: build
-#          args: --release -p linux-loader
-      - name: Run libc-tests
-        run: |
-          cd scripts
-          python3 libc-tests.py
-          cat linux/test-result.txt
-
-  doc:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-      - run: echo "nightly" >rust-toolchain
-      - name: Build docs
-        run: arch=x86_64 cargo doc --no-deps --all-features
-#        uses: actions-rs/cargo@v1
-#        with:
-#          command: doc
-#          args: --no-deps --all-features
-#      - name: Deploy to Github Pages
-#        if: ${{ github.ref == 'refs/heads/master' }}
-#        uses: JamesIves/github-pages-deploy-action@releases/v3
-#        with:
-#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-#          BRANCH: gh-pages
-#          FOLDER: target/doc
-
-
-  baremetal-libc-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          components: rust-src
-      - run: echo "nightly" >rust-toolchain
-      - run: echo "nightly" >./rboot/rust-toolchain
-      - name: Pull prebuilt images
-        run: git lfs pull -I prebuilt/linux/libc-libos.so
-      - name: Install musl toolchain qemu-system-x86
-        run: sudo apt-get install musl-tools musl-dev qemu-system-x86 -y
-      - name: Prepare rootfs and libc-test
-        run: make baremetal-test-img
-      - name: Build  kernel
-        run: cd zCore && make build mode=release linux=1 arch=x86_64
-      - name: create qemu disk
-        run: cd zCore && make baremetal-qemu-disk mode=release linux=1 arch=x86_64
-      - name: Run baremetal-libc-test
-        run: |
-          cd scripts
-          python3 ./baremetal-libc-test.py
-  baremetal-rv64-oscomp-test:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          submodules: 'recursive'
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: nightly
-          components: rust-src
-      - run: echo "nightly" >rust-toolchain
-      - run: echo "nightly" >./rboot/rust-toolchain
-      - name: Install cargo tools and qemu-system-riscv64
-        run: |
-          sudo apt install qemu-utils
-          cargo install cargo-binutils
-          rustup component add llvm-tools-preview
-          wget https://github.com/rcore-os/qemu-prebuilt/releases/download/5.2.0-riscv64/qemu-system-riscv64.tar.xz > /dev/null
-          tar xJf qemu-system-riscv64.tar.xz && sudo cp qemu-system-riscv64 /usr/local/bin
-          wget https://github.com/rcore-os/qemu-prebuilt/releases/download/qemu-share/qemu-share.tar.xz > /dev/null
-          tar xJf qemu-share.tar.xz && sudo cp -r qemu /usr/local/share/
-      - name: Prepare rootfs and oscomp
-        run: make riscv-image
-      - name: Run baremetal-libc-test
-        run: |
-          cd scripts
-          python3 baremetal-test-riscv64.py
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@ -0,0 +1,281 @@
+name: Test CI
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 22 * * *'  # every day at 22:00 UTC
+
+env:
+  rust_toolchain: nightly-2022-01-20
+  qemu_version: 7.0.0
+
+jobs:
+  unit-test:
+    name: Unit Test
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - name: Run unit test
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --no-fail-fast
+        env:
+          CARGO_INCREMENTAL: '0'
+          RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
+          RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Copt-level=0 -Coverflow-checks=off -Zpanic_abort_tests -Cpanic=abort'
+
+      - name: Cache grcov
+        uses: actions/cache@v3
+        with:
+          path: ~/.cargo/bin
+          key: ${{ runner.os }}-grcov
+
+      - name: Gather coverage data
+        id: coverage
+        uses: actions-rs/grcov@v0.1
+#      FIXME: 'error from lcovParse: Failed to parse string'
+#      - name: Coveralls upload
+#        uses: coverallsapp/github-action@master
+#        with:
+#          github-token: ${{ secrets.GITHUB_TOKEN }}
+#          path-to-lcov: ${{ steps.coverage.outputs.report }}
+
+  bench-test:
+    name: Bench Test
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - name: Run bench test
+        uses: actions-rs/cargo@v1
+        with:
+          command: bench
+
+  zircon-core-test-libos:
+    name: Zircon Core Test Libos
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - name: Pull prebuilt images
+        run: |
+          git lfs pull -I prebuilt/zircon/x64/core-tests.zbi
+          git lfs pull -I prebuilt/zircon/x64/libzircon-libos.so
+          git lfs pull -I prebuilt/zircon/x64/userboot-libos.so
+
+      - name: Install python dependencies
+        run: .github/scripts/install-deps.sh
+
+      - name: Run fast tests
+        if: github.event_name != 'schedule'
+        run: cd tests && python3 zircon_core_test.py --libos --fast --no-failed
+
+      - name: Run full tests
+        if: github.event_name == 'schedule'
+        run: cd tests && python3 zircon_core_test.py --libos
+
+  linux-libc-test-libos:
+    name: Linux Libc Test Libos
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - name: Install dependencies
+        run: .github/scripts/install-deps.sh musl-tools musl-dev
+
+      - name: Prepare rootfs
+        run: make libc-test
+
+      - name: Run fast tests
+        if: github.event_name != 'schedule'
+        run: cd tests && python3 linux_libc_test.py --libos --fast
+
+      - name: Run full tests
+        if: github.event_name == 'schedule'
+        run: cd tests && python3 linux_libc_test.py --libos
+
+  zircon-core-test-baremetal:
+    name: Zircon Core Test Baremetal
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - name: Pull prebuilt images
+        run: |
+          git lfs pull -I prebuilt/zircon/x64/core-tests.zbi
+          git lfs pull -I prebuilt/zircon/x64/libzircon.so
+          git lfs pull -I prebuilt/zircon/x64/userboot.so
+
+      - name: Install dependencies
+        run: .github/scripts/install-deps.sh ninja-build
+
+      - name: Cache QEMU
+        id: cache-qemu
+        uses: actions/cache@v3
+        with:
+          path: qemu-${{ env.qemu_version }}
+          key: qemu-${{ env.qemu_version }}-x86_64-riscv64
+
+      - name: Download and Compile QEMU
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: .github/scripts/install-qemu.sh ${{ env.qemu_version }}
+
+      - name: Install QEMU
+        run: |
+          cd qemu-${{ env.qemu_version }} && sudo make install
+          qemu-system-x86_64 --version
+
+      - name: Run fast tests
+        if: github.event_name != 'schedule'
+        run: cd tests && python3 zircon_core_test.py --fast
+
+      - name: Run full tests
+        if: github.event_name == 'schedule'
+        run: cd tests && python3 zircon_core_test.py
+
+  linux-libc-test-baremetal:
+    name: Linux Libc Test Baremetal
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, riscv64]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - if: matrix.arch == 'riscv64'
+        uses: actions-rs/install@v0.1
+        with:
+          crate: cargo-binutils
+          version: latest
+
+      - name: Install dependencies
+        run: .github/scripts/install-deps.sh musl-tools musl-dev ninja-build
+
+      - name: Cache QEMU
+        id: cache-qemu
+        uses: actions/cache@v3
+        with:
+          path: qemu-${{ env.qemu_version }}
+          key: qemu-${{ env.qemu_version }}-x86_64-riscv64
+
+      - name: Download and Compile QEMU
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: .github/scripts/install-qemu.sh ${{ env.qemu_version }}
+
+      - name: Install QEMU
+        run: |
+          cd qemu-${{ env.qemu_version }} && sudo make install
+          qemu-system-${{ matrix.arch }} --version
+
+      - name: Prepare rootfs
+        run: make libc-test ARCH=${{ matrix.arch }} && make image ARCH=${{ matrix.arch }}
+
+      - name: Run fast tests
+        if: github.event_name != 'schedule'
+        run: cd tests && python3 linux_libc_test.py --arch ${{ matrix.arch }} --fast
+
+      - name: Run full tests
+        if: github.event_name == 'schedule'
+        run: cd tests && python3 linux_libc_test.py --arch ${{ matrix.arch }}
+
+  linux-other-test-baremetal:
+    name: Linux Other Test Baremetal
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        arch: [x86_64, riscv64]
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: 'recursive'
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_toolchain }}
+          components: rust-src, llvm-tools-preview, rustfmt, clippy
+
+      - if: matrix.arch == 'riscv64'
+        uses: actions-rs/install@v0.1
+        with:
+          crate: cargo-binutils
+          version: latest
+
+      - name: Install dependencies
+        run: .github/scripts/install-deps.sh musl-tools musl-dev ninja-build
+
+      - name: Cache QEMU
+        id: cache-qemu
+        uses: actions/cache@v3
+        with:
+          path: qemu-${{ env.qemu_version }}
+          key: qemu-${{ env.qemu_version }}-x86_64-riscv64
+
+      - name: Download and Compile QEMU
+        if: steps.cache-qemu.outputs.cache-hit != 'true'
+        run: .github/scripts/install-qemu.sh ${{ env.qemu_version }}
+
+      - name: Install QEMU
+        run: |
+          cd qemu-${{ env.qemu_version }} && sudo make install
+          qemu-system-${{ matrix.arch }} --version
+
+      - name: Prepare rootfs
+        run: make other-test ARCH=${{ matrix.arch }} && make image ARCH=${{ matrix.arch }}
+
+      - name: Run fast tests
+        if: github.event_name != 'schedule'
+        run: cd tests && python3 linux_other_test.py --arch ${{ matrix.arch }} --fast
+
+      - name: Run full tests
+        if: github.event_name == 'schedule'
+        run: cd tests && python3 linux_other_test.py --arch ${{ matrix.arch }}
--- a/.gitignore
+++ b/.gitignore
@ -1,20 +1,18 @@
-/target
+**/.*
+!.github/
+!.cargo/
+!.vscode/settings.json
+
 **/target
 **/*.rs.bk
-Cargo.lock
-/rootfs
-/riscv_rootfs
-/prebuilt/linux/alpine*
-/prebuilt/linux/riscv64/prebuild*
-.idea
-scripts/linux/test-result.txt
-rusty-tags.vi
 *.img
-zCore/src/link_user.S
-scripts/rboot.conf
-stdout-baremetal-test
-stdout-zcore
-scripts/script.sh
-stdout-baremetal-test-rv64
-stdout-rv64
+*.bin
+*.log
+Cargo.lock

+/ignored
+/rootfs
+zCore/src/platform/riscv/kernel-vars.ld
+
+.DS_Store
+__pycache__
--- a/.gitmodules
+++ b/.gitmodules
@ -1,3 +1,9 @@
 [submodule "rboot"]
 	path = rboot
 	url = https://github.com/rcore-os/rboot.git
+[submodule "tests"]
+	path = tests
+	url = https://github.com/rcore-os/zcore-tests.git
+[submodule "libc-test"]
+	path = libc-test
+	url = https://github.com/rcore-os/libc-test
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@ -0,0 +1,10 @@
+{
+    // Prevent "can't find crate for `test`" error on no_std
+    // Ref: https://github.com/rust-lang/vscode-rust/issues/729
+    // For vscode-rust plugin users:
+    "rust.target": "riscv64imac-unknown-none-elf",
+    "rust.all_targets": false,
+    // For Rust Analyzer plugin users:
+    "rust-analyzer.cargo.target": "riscv64imac-unknown-none-elf",
+    "rust-analyzer.checkOnSave.enable": false
+}
--- a/Cargo.toml
+++ b/Cargo.toml
@ -1,18 +1,17 @@
 [workspace]
 members = [
-    "zircon-object",
-    "zircon-loader",
-    "linux-object",
-    "zircon-syscall",    
-    "linux-loader",
-    "kernel-hal-unix",
+    "drivers",
    "kernel-hal",
-]
-
-exclude = [
-    "zircon-user",
-    "zCore",
-    "rboot",
+    "zircon-object",
+    "zircon-syscall",
+    "linux-object",
    "linux-syscall",
-    "kernel-hal-bare",    
+    "loader",
+    "zCore",
+    "xtask",
 ]
+default-members = ["xtask"]
+exclude = ["zircon-user", "rboot"]
+
+[profile.release]
+lto = true
--- a/123
+++ b/123
@ -1,106 +1,53 @@
-ROOTFS_TAR := alpine-minirootfs-3.12.0-x86_64.tar.gz
-ROOTFS_URL := http://dl-cdn.alpinelinux.org/alpine/v3.12/releases/x86_64/$(ROOTFS_TAR)
-
-RISCV64_ROOTFS_TAR := prebuild.tar.xz
-RISCV64_ROOTFS_URL := https://github.com/rcore-os/libc-test-prebuilt/releases/download/0.1/$(RISCV64_ROOTFS_TAR)
+# Makefile for top level of zCore

 ARCH ?= x86_64
-rcore_fs_fuse_revision := 7f5eeac
-OUT_IMG := zCore/$(ARCH).img
-TMP_ROOTFS := /tmp/rootfs

-# for linux syscall tests
-TEST_DIR := linux-syscall/test/
-DEST_DIR := rootfs/bin/
-TEST_PATH := $(wildcard $(TEST_DIR)*.c)
-BASENAMES := $(notdir  $(basename $(TEST_PATH)))
+.PHONY: help setup update rootfs libc-test other-test image check doc clean

-CFLAG := -Wl,--dynamic-linker=/lib/ld-musl-x86_64.so.1
+# print top level help
+help:
+	cargo xtask help

-.PHONY: rootfs libc-test rcore-fs-fuse image
+# setup git lfs and git submodules
+setup:
+	cargo setup

-prebuilt/linux/$(ROOTFS_TAR):
-	wget $(ROOTFS_URL) -O $@
+# update toolchain and dependencies
+update:
+	cargo update-all

-prebuilt/linux/riscv64/$(RISCV64_ROOTFS_TAR):
-	@wget $(RISCV64_ROOTFS_URL) -O $@
-
-rootfs: prebuilt/linux/$(ROOTFS_TAR)
-	rm -rf rootfs && mkdir -p rootfs
-	tar xf $< -C rootfs
-# libc-libos.so (convert syscall to function call) is from https://github.com/rcore-os/musl/tree/rcore
-	cp prebuilt/linux/libc-libos.so rootfs/lib/ld-musl-x86_64.so.1
-	@for VAR in $(BASENAMES); do gcc $(TEST_DIR)$$VAR.c -o $(DEST_DIR)$$VAR $(CFLAG); done
-
-riscv-rootfs:prebuilt/linux/riscv64/$(RISCV64_ROOTFS_TAR)
-	@rm -rf riscv_rootfs && mkdir -p riscv_rootfs
-	@tar -xvf $< -C riscv_rootfs --strip-components 1
+# put rootfs for linux mode
+rootfs:
+	cargo rootfs --arch $(ARCH)

+# put libc tests into rootfs
 libc-test:
-	cd rootfs && git clone git://repo.or.cz/libc-test --depth 1
-	cd rootfs/libc-test && cp config.mak.def config.mak && echo 'CC := musl-gcc' >> config.mak && make -j
+	cargo libc-test --arch $(ARCH)

-rcore-fs-fuse:
-ifneq ($(shell rcore-fs-fuse dir image git-version), $(rcore_fs_fuse_revision))
-	@echo Installing rcore-fs-fuse
-	@cargo install rcore-fs-fuse --git https://github.com/rcore-os/rcore-fs --rev $(rcore_fs_fuse_revision) --force
-endif
+# put other tests into rootfs
+other-test:
+	cargo other-test --arch $(ARCH)

-$(OUT_IMG): prebuilt/linux/$(ROOTFS_TAR) rcore-fs-fuse
-	@echo Generating $(ARCH).img
-	@rm -rf $(TMP_ROOTFS)
-	@mkdir -p $(TMP_ROOTFS)
-	@tar xf $< -C $(TMP_ROOTFS)
-	@cp $(TMP_ROOTFS)/lib/ld-musl-x86_64.so.1 rootfs/lib/
-	@rcore-fs-fuse $@ rootfs zip
-# recover rootfs/ld-musl-x86_64.so.1 for zcore usr libos
-# libc-libos.so (convert syscall to function call) is from https://github.com/rcore-os/musl/tree/rcore
-	@cp prebuilt/linux/libc-libos.so rootfs/lib/ld-musl-x86_64.so.1
+# build image from rootfs
+image:
+	cargo image --arch $(ARCH)

-image: $(OUT_IMG)
-	@echo Resizing $(ARCH).img
-	@qemu-img resize $(OUT_IMG) +50M
+# check code style
+check:
+	cargo check-style

+# build and open project document
+doc:
+	cargo doc --open

-riscv-image: rcore-fs-fuse riscv-rootfs
-	@echo building riscv.img
-	@rcore-fs-fuse zCore/riscv64.img riscv_rootfs zip
-	@qemu-img resize -f raw zCore/riscv64.img +50M
-	
+# clean targets
 clean:
 	cargo clean
-	find zCore -maxdepth 1 -name "*.img" -delete
 	rm -rf rootfs
-	rm -rf riscv-rootfs
-	find zCore/target -type f -name "*.zbi" -delete
-	find zCore/target -type f -name "*.elf" -delete
-	cd linux-syscall/test-oscomp && make clean
-	cd linux-syscall/busybox && make clean
-	cd linux-syscall/lua && make clean
-	cd linux-syscall/lmbench && make clean
-
-doc:
-	arch=x86_64 cargo doc --open
-
-baremetal-test-img: prebuilt/linux/$(ROOTFS_TAR) rcore-fs-fuse
-	@echo Generating $(ARCH).img
-	@rm -rf $(TMP_ROOTFS)
-	@mkdir -p $(TMP_ROOTFS)
-	@tar xf $< -C $(TMP_ROOTFS)
-	@mkdir -p rootfs/lib
-	@cp $(TMP_ROOTFS)/lib/ld-musl-x86_64.so.1 rootfs/lib/
-	@cd rootfs && rm -rf libc-test && git clone git://repo.or.cz/libc-test --depth 1
-	@cd rootfs/libc-test && cp config.mak.def config.mak && echo 'CC := musl-gcc' >> config.mak && make -j
-	@rcore-fs-fuse $(OUT_IMG) rootfs zip
-# recover rootfs/ld-musl-x86_64.so.1 for zcore usr libos
-# libc-libos.so (convert syscall to function call) is from https://github.com/rcore-os/musl/tree/rcore
-	@cp prebuilt/linux/libc-libos.so rootfs/lib/ld-musl-x86_64.so.1
-	@echo Resizing $(ARCH).img
-	@qemu-img resize $(OUT_IMG) +50M
-
-baremetal-test:
-	@make -C zCore baremetal-test mode=release linux=1 | tee stdout-baremetal-test
-
-baremetal-test-rv64:
-	@make -C zCore baremetal-test-rv64 arch=riscv64 mode=release linux=1 ROOTPROC=$(ROOTPROC) | tee -a stdout-baremetal-test-rv64 | tee stdout-rv64
+	rm -rf ignored/target
+	find zCore -maxdepth 1 -name "*.img" -delete

+rt-test:
+	cd rootfs/x86_64 && git clone https://kernel.googlesource.com/pub/scm/linux/kernel/git/clrkwllms/rt-tests --depth 1
+	cd rootfs/x86_64/rt-tests && make
+	echo x86 gcc build rt-test,now need manual modificy.
--- a/README.md
+++ b/README.md
@ -1,11 +1,15 @@
 # zCore

 [![CI](https://github.com/rcore-os/zCore/workflows/CI/badge.svg?branch=master)](https://github.com/rcore-os/zCore/actions)
-[![Docs](https://img.shields.io/badge/docs-alpha-blue)](https://rcore-os.github.io/zCore/zircon_object/)
+[![Docs](https://img.shields.io/badge/docs-alpha-blue)](https://rcore-os.github.io/zCore/)
 [![Coverage Status](https://coveralls.io/repos/github/rcore-os/zCore/badge.svg?branch=master)](https://coveralls.io/github/rcore-os/zCore?branch=master)

 Reimplement [Zircon][zircon] microkernel in safe Rust as a userspace program!

+## Manual
+
+[This](docs/Manual.md) is a new simple chinese manual.
+
 ## Dev Status

 🚧 Working In Progress
@ -13,25 +17,26 @@ Reimplement [Zircon][zircon] microkernel in safe Rust as a userspace program!
 - 2020.04.16: Zircon console is working on zCore! 🎉

 ## Quick start for RISCV64
-```
+
+```sh
 make riscv-image
 cd zCore
-make run arch=riscv64 linux=1
+make run ARCH=riscv64 LINUX=1
 ```

 ## Getting started

 Environments：

-* [Rust toolchain](http://rustup.rs)
-* [QEMU](https://www.qemu.org)
-* [Git LFS](https://git-lfs.github.com)
-
+- [Rust toolchain](http://rustup.rs)
+- [QEMU](https://www.qemu.org)
+- [Git LFS](https://git-lfs.github.com)

 ### Developing environment info
- current rustc -- rustc 1.56.0-nightly (08095fc1f 2021-07-26)
- current rust-toolchain -- nightly-2021-07-27
- current qemu -- 5.2.0
+
+- current rustc -- rustc 1.60.0-nightly (5e57faa78 2022-01-19)
+- current rust-toolchain -- nightly-2022-01-20
+- current qemu -- 5.2.0 -> 6.2.0

 Clone repo and pull prebuilt fuchsia images:

@ -48,57 +53,117 @@ For users in China, there's a mirror you can try:
 git clone https://github.com.cnpmjs.org/rcore-os/zCore --recursive
 ```

-Prepare Alpine Linux rootfs:
+### Run zcore in libos mode

-```sh
-make rootfs
-```
+#### Run zcore in linux-libos mode

-Run native Linux program (Busybox):
+- step 1: Prepare Alpine Linux rootfs:

-```sh
-cargo run --release -p linux-loader -- /bin/busybox [args]
-```
+  ```sh
+  make rootfs
+  ```

-Run native Zircon program (shell):
+- step 2: Compile & Run native Linux program (Busybox) in libos mode:

-```sh
-cargo run --release -p zircon-loader -- prebuilt/zircon/x64
-```
+  ```sh
+  cargo run --release --features "linux libos" -- /bin/busybox [args]
+  ```

-Run Linux shell on bare-metal (zCore):
+  You can also add the feature `graphic` to show the graphical output (with [sdl2](https://www.libsdl.org) installed).

-```sh
-make image
-cd zCore && make run mode=release linux=1 [graphic=on] [accel=1]
-```
+  To debug, set the `LOG` environment variable to one of `error`, `warn`, `info`, `debug`, `trace`.

-Run Zircon on bare-metal (zCore):
+#### Run native Zircon program (shell) in zircon-libos mode:

-```sh
-cd zCore && make run mode=release [graphic=on] [accel=1]
-```
+- step 1: Compile and Run Zircon shell

-Build and run your own Zircon user programs:
+  ```sh
+  cargo run --release --features "zircon libos" -- prebuilt/zircon/x64/bringup.zbi
+  ```

-```sh
-# See template in zircon-user
-cd zircon-user && make zbi mode=release
+  The `graphic` and `LOG` options are the same as Linux.

-# Run your programs in zCore
-cd zCore && make run mode=release user=1
-```
+### Run zcore in bare-metal mode

-To debug, set `RUST_LOG` environment variable to one of `error`, `warn`, `info`, `debug`, `trace`.
+#### Run Linux shell in  linux-bare-metal mode:
+
+- step 1: Prepare Alpine Linux rootfs:
+
+  ```sh
+  make rootfs
+  ```
+
+- step 2: Create Linux rootfs image:
+
+  Note: Before below step, you can add some special apps in zCore/rootfs
+
+  ```sh
+  make image
+  ```
+
+- step 3: Build and run zcore in  linux-bare-metal mode:
+
+  ```sh
+  cd zCore && make run MODE=release LINUX=1 [LOG=warn] [GRAPHIC=on] [ACCEL=1]
+  ```
+
+#### Run Zircon shell in zircon-bare-metal mode:
+
+- step 1: Build and run zcore in  zircon-bare-metal mode:
+
+  ```sh
+  cd zCore && make run MODE=release [LOG=warn] [GRAPHIC=on] [ACCEL=1]
+  ```
+
+- step 2: Build and run your own Zircon user programs:
+
+  ```sh
+  # See template in zircon-user
+  cd zircon-user && make zbi MODE=release
+
+  # Run your programs in zCore
+  cd zCore && make run MODE=release USER=1 [LOG=warn] [GRAPHIC=on] [ACCEL=1]
+  ```

 ## Testing
+
 ### LibOS Mode Testing

 #### Zircon related
+
 Run Zircon official core-tests:

 ```sh
-cd zCore && make test mode=release [accel=1] test_filter='Channel.*'
+pip3 install pexpect
+cd scripts && python3 unix-core-testone.py 'Channel.*'
+```
+
+Run all (non-panicked) core-tests for CI:
+
+```sh
+pip3 install pexpect
+cd scripts && python3 unix-core-tests.py
+# Check `zircon/test-result.txt` for results.
+```
+
+#### Linux related
+
+Run Linux musl libc-tests for CI:
+
+```sh
+make rootfs && make libc-test
+cd scripts && python3 libos-libc-tests.py
+# Check `linux/test-result.txt` for results.
+```
+
+### Bare-metal Mode Testing
+
+#### Zircon related
+
+Run Zircon official core-tests on bare-metal:
+
+```sh
+cd zCore && make test MODE=release [ACCEL=1] TEST_FILTER='Channel.*'
 ```

 Run all (non-panicked) core-tests for CI:
@ -108,57 +173,92 @@ pip3 install pexpect
 cd scripts && python3 core-tests.py
 # Check `zircon/test-result.txt` for results.
 ```
-#### Linux related
-
-Run Linux musl libc-tests for CI:
-
-```sh
-make rootfs && make libc-test
-cd scripts && python3 libc-tests.py
-# Check `linux/test-result.txt` for results.
-```
-
-### Baremetal Mode Testing

 #### x86-64 Linux related

 Run Linux musl libc-tests for CI:
-```
+
+```sh
 ##  Prepare rootfs with libc-test apps
 make baremetal-test-img
 ## Build zCore kernel
-cd zCore && make build mode=release linux=1 arch=x86_64
+cd zCore && make build MODE=release LINUX=1 ARCH=x86_64
 ## Testing
-cd ../scripts && python3 ./baremetal-libc-test.py
-## 
+cd scripts && python3 baremetal-libc-test.py
+##
 ```

-You can use [`scripts/baremetal-libc-test-ones.py`](./scripts/baremetal-libc-test-ones.py) & [`scripts/linux/baremetal-test-ones.txt`](./scripts/linux/baremetal-test-ones.txt) to test specified apps. 
+You can use [`scripts/baremetal-libc-test-ones.py`](./scripts/baremetal-libc-test-ones.py) & [`scripts/linux/baremetal-test-ones.txt`](./scripts/linux/baremetal-test-ones.txt) to test specified apps.

 [`scripts/linux/baremetal-test-fail.txt`](./scripts/linux/baremetal-test-fail.txt) includes all failed x86-64 apps (We need YOUR HELP to fix bugs!)

 #### riscv-64 Linux related

 Run Linux musl libc-tests for CI:
-```
+
+```sh
 ##  Prepare rootfs with libc-test & oscomp apps
 make riscv-image
 ## Build zCore kernel & Testing
-cd ../scripts && python3 baremetal-test-riscv64.py
-## 
+cd scripts && python3 baremetal-test-riscv64.py
+##
 ```

-You can use[ `scripts/baremetal-libc-test-ones-riscv64.py`](./scripts/baremetal-libc-test-ones-riscv64.py) & [`scripts/linux/baremetal-test-ones-rv64.txt`](scripts/linux/baremetal-test-ones-rv64.txt)to test 
+You can use[scripts/baremetal-libc-test-ones-riscv64.py](./scripts/baremetal-libc-test-ones-riscv64.py) & [`scripts/linux/baremetal-test-ones-rv64.txt`](scripts/linux/baremetal-test-ones-rv64.txt)to test
 specified apps.

 [`scripts/linux/baremetal-test-fail-riscv64.txt`](./scripts/linux/baremetal-test-fail-riscv64.txt)includes all failed riscv-64 apps (We need YOUR HELP to fix bugs!)

+## Graph/Game
+
+snake game: <https://github.com/rcore-os/rcore-user/blob/master/app/src/snake.c>
+
+### Step1: compile usr app
+
+We can use musl-gcc compile it in x86_64 mode
+
+### Step2: change zcore for run snake app first.
+
+change zCore/zCore/main.rs L176
+vec!["/bin/busybox".into(), "sh".into()]
+TO
+vec!["/bin/snake".into(), "sh".into()]
+
+### Step3: prepare root fs image, run zcore in linux-bare-metal mode
+
+exec:
+
+```sh
+cd zCore #zCore ROOT DIR
+make rootfs
+cp ../rcore-user/app/snake rootfs/bin #copy snake ELF file to rootfs/bin
+make image # build rootfs image
+cd zCore #zCore kernel dir
+make run MODE=release LINUX=1 GRAPHIC=on
+```
+
+Then you can play the game.
+Operation
+
+- Keyboard
+  - `W`/`A`/`S`/`D`: Move
+  - `R`: Restart
+  - `ESC`: End
+- Mouse
+  - `Left`: Speed up
+  - `Right`: Slow down
+  - `Middle`: Pause/Resume
+
 ## Doc
+
 ```
 make doc
 ```
-### riscv64 porting info
+
+### RISC-V 64 porting info
+
 - [porting riscv64 doc](./docs/porting-rv64.md)
+
 ## Components

 ### Overview
@ -178,4 +278,5 @@ make doc
 | Exception Handling        | Interrupt  | Signal            |

 ### Small Goal & Little Plans
- https://github.com/rcore-os/zCore/wiki/Plans
+
+- <https://github.com/rcore-os/zCore/wiki/Plans>
--- a/docs/Manual.md
+++ b/docs/Manual.md
@ -0,0 +1,86 @@
+# zCore 项目使用指南
+
+## 预定功能
+
+预定功能指的是 zCore 作为一个项目，为开发者和用户常用操作提供的封装。
+
+由于历史原因，目前预定功能分为顶层预定功能和内核预定功能。
+所有顶层提供的预定功能都定义于 [顶层 Makefile](../Makefile)，
+并且所有预定功能最终都将移动到顶层。
+
+## 常规操作流程
+
+对于一般开发者和用户，可以按以下步骤设置 zCore 项目。
+
+1. 先决条件
+
+   目前已测试的开发环境包括 Ubuntu20.04、Ubuntu22.04 和 Debian11，
+   Ubuntu22.04 不能正确编译 x86_64 的 libc 测试。
+   若不需要烧写到物理硬件，使用 WSL2 或其他虚拟机的操作与真机并无不同之处。
+
+   在开始之前，确保你的计算机上安装了 git 和 rustup。要在虚拟环境开发或测试，需要 QEMU。
+
+2. 克隆项目
+
+   ```bash
+   git clone https://github.com/rcore-os/zCore.git
+   ```
+
+3. 初始化存储库
+
+   ```bash
+   make setup
+   ```
+
+4. 保持更新
+
+   ```bash
+   make update
+   ```
+
+5. 探索更多操作
+
+   ```bash
+   make help
+   ```
+
+6. 推到仓库前，现在本机执行测试
+
+   ```bash
+   make check # CI/build 的一部分，未来会实现更多快速测试指令
+   ```
+
+## Linux 模式
+
+zCore 根据向用户提供的系统调用的不同，可分为 zircon 模式和 linux 模式。
+要以 linux 模式启动，需要先构建 linux 的启动文件系统。
+
+这个指令构建适于 x86_64 架构的启动文件系统。
+
+```bash
+make rootfs ARCH=x86_64
+```
+
+这个指令构建适于 riscv64 架构的启动文件系统。
+
+```bash
+make rootfs ARCH=riscv64
+```
+
+要执行 musl-libc 测试集，需要向文件系统中添加 libc 测试集：
+
+```bash
+make libc-test <ARCH=?>
+```
+
+要执行 CI 的其他测试，需要向文件系统中添加相应测试集：
+
+```bash
+make other-test <ARCH=?>
+```
+
+要以裸机模式启动 zCore，需要构造将放到设备或虚拟环境中的镜像文件：
+
+```bash
+make image <ARCH=?>
+```
--- a/docs/README-D1.md
+++ b/docs/README-D1.md
@ -0,0 +1,119 @@
+# zCore for riscv64
+
+## 编译 zCore 系统镜像
+
+先在源码根目录下编译 riscv64 的文件系统。
+
+然后进入子目录 zCore 编译内核,会生成系统镜像`zcore.bin`
+
+```sh
+make riscv-image
+cd zCore
+make build LINUX=1 ARCH=riscv64 PLATFORM=d1 MODE=release
+```
+
+## riscv64 开发板的烧写
+
+以全志 D1 c906 开发板为例。
+
+下载并编译烧写工具 `xfel`:
+
+```sh
+git clone https://github.com/xboot/xfel.git
+cd xfel
+make
+```
+
+### 自动烧写运行：
+
+安装好工具 `xfel`，开发板进入 FEL 模式，可在开发板的 Linux 系统中执行 `reboot efex` 命令进入 FEL 模式。然后运行：
+
+```sh
+make run_d1 LINUX=1 ARCH=riscv64 PLATFORM=d1 MODE=release
+```
+
+### 手动烧写运行：
+
+1. 下载 D1 开发板的 [OpenSBI](https://github.com/elliott10/opensbi) 源码，并编译出镜像 build/platform/thead/c910/firmware/fw_payload.elf：
+
+    ```sh
+    git clone https://github.com/elliott10/opensbi -b thead
+    cd opensbi
+    make PLATFORM=thead/c910 CROSS_COMPILE=/path/to/toolchain/bin/riscv64-unknown-linux-gnu- SUNXI_CHIP=sun20iw1p1 PLATFORM_RISCV_ISA=rv64gcxthead
+    ```
+
+    或使用预编译的镜像 [prebuilt/firmware/d1/fw_payload.elf](../prebuilt/firmware/d1/fw_payload.elf)。
+
+2. 生成包含了 OpenSBI, dtb, zCore 的待烧写固件:
+
+    ```sh
+    rust-objcopy --binary-architecture=riscv64 ../prebuilt/firmware/d1/fw_payload.elf --strip-all -O binary ./zcore_d1.bin
+    dd if=../target/riscv64/release/zcore.bin of=zcore_d1.bin bs=512 seek=2048
+    ```
+
+3. 启动全志 D1 c906 开发板，并进入 FEL 模式。然后通过烧写工具 `xfel` 把 zCore 系统镜像载入到 DDR 中：
+
+    ```
+    sudo xfel ddr ddr3
+    sudo xfel write 0x40000000 zcore_d1.bin
+    sudo xfel exec 0x40000000
+    ```
+
+## 引导运行
+
+zCore 成功引导后, OpenSBI 会将 dtb 加载到高地址 `0x5ff00000`，运行如下所示：
+
+```
+OpenSBI smartx-d1-tina-v1.0.1-release
+   ____                    _____ ____ _____
+  / __ \                  / ____|  _ \_   _|
+ | |  | |_ __   ___ _ __ | (___ | |_) || |
+ | |  | | '_ \ / _ \ '_ \ \___ \|  _ < | |
+ | |__| | |_) |  __/ | | |____) | |_) || |_
+  \____/| .__/ \___|_| |_|_____/|____/_____|
+        | |
+        |_|
+
+Platform Name          : T-HEAD Xuantie Platform
+Platform HART Features : RV64ACDFIMSUVX
+Platform Max HARTs     : 1
+Current Hart           : 0
+Firmware Base          : 0x40000400
+Firmware Size          : 75 KB
+Runtime SBI Version    : 0.2
+
+MIDELEG : 0x0000000000000222
+MEDELEG : 0x000000000000b1ff
+PMP0    : 0x0000000040000000-0x000000004001ffff (A)
+PMP1    : 0x0000000040000000-0x000000007fffffff (A,R,W,X)
+PMP2    : 0x0000000080000000-0x00000000bfffffff (A,R,W,X)
+PMP3    : 0x0000000000020000-0x0000000000027fff (A,R,W,X)
+PMP4    : 0x0000000000000000-0x000000003fffffff (A,R,W)
+      ____
+ ____/ ___|___  _ __ ___
+|_  / |   / _ \| '__/ _ \
+ / /| |__| (_) | | |  __/
+/___|\____\___/|_|  \___|
+
+Welcome to zCore rust_main( hartid: 0x0, device_tree_paddr: 0x44ddc )
+Uart output testing
+++ Setting up UART interrupts +++
+++ Setting up PLIC +++
+++ setup interrupt +++
+Exception::Breakpoint: A breakpoint set @0xffffffffc0167f56
+Device Tree @ 0x0
+[138.8430296s  WARN 0 0:0] elf relocate Err:".rela.dyn not found"
+[139.2137079s  WARN 0 0:0] brk: unimplemented
+[139.8335662s  WARN 0 0:0] TCGETS | TIOCGWINSZ | TIOCSPGRP, pretend to be tty.
+[140.5358217s  WARN 0 0:0] TIOCGPGRP, pretend to be have a tty process group.
+[140.6017734s  WARN 0 0:0] getpgid: unimplemented
+[140.8971624s  WARN 0 0:0] setpgid: unimplemented
+/ #
+/ # ls
+bin  dev  tmp
+/ # hello
+Hello world from user mode program!
+                                   By xiaoluoyuan@163.com
+/ #
+
+```
--- a/drivers/Cargo.toml
+++ b/drivers/Cargo.toml
@ -0,0 +1,46 @@
+[package]
+name = "zcore-drivers"
+version = "0.1.0"
+authors = ["Yuekai Jia <equation618@gmail.com>"]
+edition = "2018"
+description = "Device drivers of zCore"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[features]
+graphic = ["rcore-console"]
+mock = ["async-std", "sdl2"]
+virtio = ["virtio-drivers"]
+
+[dependencies]
+log = "0.4"
+spin = "0.9"
+cfg-if = "1.0"
+bitflags = "1.3"
+lazy_static = "1.4"
+numeric-enum-macro = "0.2"
+device_tree = { git = "https://github.com/rcore-os/device_tree-rs", rev = "2f2e55f" }
+bitmap-allocator = { git = "https://github.com/rcore-os/bitmap-allocator", rev = "88e871a5" }
+pci = { git = "https://github.com/elliott10/pci-rs", rev = "8f33774b" }
+virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers", rev = "2aaf7d6", optional = true }
+rcore-console = { git = "https://github.com/rcore-os/rcore-console", default-features = false, rev = "ca5b1bc", optional = true }
+lock = { git = "https://github.com/DeathWish5/kernel-sync", rev = "01b2e70" }
+isomorphic_drivers = { git = "https://github.com/rcore-os/isomorphic_drivers", rev = "f7cd97a8", features = ["log"] }
+smoltcp = { git = "https://github.com/smoltcp-rs/smoltcp", rev = "35e833e3", default-features = false, features = ["log", "alloc", "verbose", "proto-ipv4", "proto-ipv6", "proto-igmp", "medium-ip", "medium-ethernet", "socket-raw", "socket-udp", "socket-tcp", "socket-icmp", "async"] }
+
+# LibOS mode
+[target.'cfg(not(target_os = "none"))'.dependencies]
+async-std = { version = "1.10", optional = true }
+sdl2 = { version = "0.34", optional = true }
+
+# Bare-metal mode
+[target.'cfg(target_os = "none")'.dependencies]
+
+
+[target.'cfg(target_arch = "x86_64")'.dependencies]
+acpi = "4.1"
+x2apic = "0.4"
+x86_64 = "0.14"
+
+[target.'cfg(any(target_arch = "riscv32", target_arch = "riscv64"))'.dependencies]
+riscv = "0.8"
--- a/drivers/src/builder/devicetree.rs
+++ b/drivers/src/builder/devicetree.rs
@ -0,0 +1,270 @@
+// 解析设备树，创建已知的设备并为它们注册中断。
+//
+// 涉及到中断的设备包括：
+//
+// - 接收中断的中断控制器
+// - 发出中断的设备
+//
+// 有效的中断控制器应该具有下列三个属性：
+//
+// - `interrupt-controller`: 指示这是一个中断控制器
+// - `interrupt-cells`: 只是要向此控制器注册中断需要几个参数
+// - `phandle`: 向此控制器注册中断时使用的一个号码，如果没有设备需要向它注册，可能不存在
+//
+// 设备注册中断需要 `interrupts_extended` 属性，这是一个 `Vec<u32>`，形式为 `[{phandle, ...,}*]`，
+// 即控制器引用和控制器指定数量的参数。
+//! Probe devices and create drivers from device tree.
+//!
+//! Specification: <https://github.com/devicetree-org/devicetree-specification/releases/download/v0.3/devicetree-specification-v0.3.pdf>.
+
+use alloc::{collections::BTreeMap, sync::Arc, vec::Vec};
+
+use super::IoMapper;
+use crate::{
+    utils::devicetree::{
+        parse_interrupts, parse_reg, Devicetree, InheritProps, InterruptsProp, Node, StringList,
+    },
+    Device, DeviceError, DeviceResult, VirtAddr,
+};
+
+const MODULE: &str = "device-tree";
+
+type DevWithInterrupt = (Device, InterruptsProp);
+
+/// 设备树中中断控制器特有的属性
+struct IntcProps {
+    phandle: u32,
+    interrupt_cells: u32,
+}
+
+/// 查找表保存的中断控制器信息
+struct Intc {
+    index: usize,
+    cells: usize,
+}
+
+/// A builder to probe devices and create drivers from device tree.
+pub struct DevicetreeDriverBuilder<M: IoMapper> {
+    dt: Devicetree,
+    io_mapper: M,
+}
+
+impl<M: IoMapper> DevicetreeDriverBuilder<M> {
+    /// Prepare to parse DTB from the given virtual address.
+    pub fn new(dtb_base_vaddr: VirtAddr, io_mapper: M) -> DeviceResult<Self> {
+        Ok(Self {
+            dt: Devicetree::from(dtb_base_vaddr)?,
+            io_mapper,
+        })
+    }
+
+    /// Parse the device tree from root, and returns an array of [`Device`] it found.
+    pub fn build(&self) -> DeviceResult<Vec<Device>> {
+        let mut intc_map = BTreeMap::new(); // phandle -> intc
+        let mut dev_list = Vec::new(); // devices
+
+        // 解析设备树
+        self.dt.walk(&mut |node, comp, props| {
+            debug!(
+                "{MODULE}: parsing node {:?} with compatible {comp:?}",
+                node.name
+            );
+            // parse interrupt controller
+            let res = if node.has_prop("interrupt-controller") {
+                self.parse_intc(node, comp, props).map(|(dev, intc)| {
+                    intc_map.insert(
+                        intc.phandle,
+                        Intc {
+                            index: dev_list.len(),
+                            cells: intc.interrupt_cells as _,
+                        },
+                    );
+                    dev
+                })
+            } else {
+                // parse other device
+                match comp {
+                    #[cfg(feature = "virtio")]
+                    c if c.contains("virtio,mmio") => self.parse_virtio(node, props),
+                    c if c.contains("allwinner,sunxi-gmac") => {
+                        self.parse_ethernet(node, comp, props)
+                    }
+                    c if c.contains("ns16550a") || c.contains("allwinner,sun20i-uart") => {
+                        self.parse_uart(node, comp, props)
+                    }
+                    _ => Err(DeviceError::NotSupported),
+                }
+            };
+            match res {
+                Ok(dev) => dev_list.push(dev),
+                Err(DeviceError::NotSupported) => {}
+                Err(err) => warn!("{MODULE}: failed to parsing node {:?}: {err:?}", node.name),
+            }
+        });
+
+        // 注册中断
+        for (device, interrupts_extended) in &dev_list {
+            let mut extended = interrupts_extended.as_slice();
+            // 分解 interrupts_extended
+            while let [phandle, irq_num, ..] = extended {
+                if let Some(Intc { index, cells }) = intc_map.get(phandle) {
+                    let (intc, _) = &dev_list[*index];
+                    extended = &extended[1 + cells..];
+                    if let Device::Irq(irq) = intc {
+                        if *irq_num != 0xffff_ffff {
+                            info!("{MODULE}: register interrupts for {intc:?}: {device:?}, irq_num={irq_num}");
+                            if irq.register_device(*irq_num as _, device.inner()).is_ok() {
+                                irq.unmask(*irq_num as _)?;
+                            }
+                        }
+                    } else {
+                        warn!("{MODULE}: node with phandle {phandle:#x} is not an interrupt-controller");
+                        return Err(DeviceError::InvalidParam);
+                    }
+                } else {
+                    warn!(
+                        "{MODULE}: no such node with phandle {phandle:#x} as the interrupt-parent"
+                    );
+                    return Err(DeviceError::InvalidParam);
+                }
+            }
+        }
+
+        // 丢弃中断信息
+        Ok(dev_list.into_iter().map(|(dev, _)| dev).collect())
+    }
+}
+
+#[allow(dead_code)]
+#[allow(unused_imports)]
+#[allow(unused_variables)]
+#[allow(unreachable_code)]
+impl<M: IoMapper> DevicetreeDriverBuilder<M> {
+    /// Parse nodes for interrupt controllers.
+    fn parse_intc(
+        &self,
+        node: &Node,
+        comp: &StringList,
+        props: &InheritProps,
+    ) -> DeviceResult<(DevWithInterrupt, IntcProps)> {
+        let phandle = node
+            .prop_u32("phandle")
+            .map_err(|_| DeviceError::InvalidParam)?;
+        let interrupt_cells = node
+            .prop_u32("#interrupt-cells")
+            .map_err(|_| DeviceError::InvalidParam)?;
+        let interrupts_extended = parse_interrupts(node, props)?;
+        let base_vaddr = parse_reg(node, props).and_then(|(paddr, size)| {
+            self.io_mapper
+                .query_or_map(paddr as usize, size as usize)
+                .ok_or(DeviceError::NoResources)
+        });
+        use crate::irq::*;
+        let dev = Device::Irq(match comp {
+            #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+            c if c.contains("riscv,cpu-intc") => Arc::new(riscv::Intc::new()),
+            #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+            c if c.contains("riscv,plic0") => Arc::new(riscv::Plic::new(base_vaddr?)),
+            _ => return Err(DeviceError::NotSupported),
+        });
+
+        Ok((
+            (dev, interrupts_extended),
+            IntcProps {
+                phandle,
+                interrupt_cells,
+            },
+        ))
+    }
+
+    /// Parse nodes for virtio devices over MMIO.
+    #[cfg(feature = "virtio")]
+    fn parse_virtio(&self, node: &Node, props: &InheritProps) -> DeviceResult<DevWithInterrupt> {
+        use crate::virtio::*;
+        use virtio_drivers::{DeviceType, VirtIOHeader};
+
+        let interrupts_extended = parse_interrupts(node, props)?;
+        let base_vaddr = parse_reg(node, props).and_then(|(paddr, size)| {
+            self.io_mapper
+                .query_or_map(paddr as usize, size as usize)
+                .ok_or(DeviceError::NoResources)
+        })?;
+        let header = unsafe { &mut *(base_vaddr as *mut VirtIOHeader) };
+        if !header.verify() {
+            return Err(DeviceError::NotSupported);
+        }
+        info!(
+            "{MODULE}: detected virtio device: vendor_id={:#X}, type={:?}",
+            header.vendor_id(),
+            header.device_type()
+        );
+
+        let dev = match header.device_type() {
+            DeviceType::Block => Device::Block(Arc::new(VirtIoBlk::new(header)?)),
+            DeviceType::GPU => Device::Display(Arc::new(VirtIoGpu::new(header)?)),
+            DeviceType::Input => Device::Input(Arc::new(VirtIoInput::new(header)?)),
+            DeviceType::Console => Device::Uart(Arc::new(VirtIoConsole::new(header)?)),
+            _ => return Err(DeviceError::NotSupported),
+        };
+
+        Ok((dev, interrupts_extended))
+    }
+
+    /// Parse nodes for Ethernet devices.
+    fn parse_ethernet(
+        &self,
+        node: &Node,
+        comp: &StringList,
+        props: &InheritProps,
+    ) -> DeviceResult<DevWithInterrupt> {
+        let interrupts_extended = parse_interrupts(node, props)?;
+        let base_vaddr = parse_reg(node, props).and_then(|(paddr, size)| {
+            self.io_mapper
+                .query_or_map(paddr as usize, size as usize)
+                .ok_or(DeviceError::NoResources)
+        });
+        info!("Ethernet gmac init ...");
+
+        let irq_num = interrupts_extended[1];
+        use crate::net::*;
+        let dev = Device::Net(match comp {
+            #[cfg(target_arch = "riscv64")]
+            c if c.contains("allwinner,sunxi-gmac") => {
+                Arc::new(rtlx_init(irq_num as usize, |paddr, size| {
+                    self.io_mapper.query_or_map(paddr, size)
+                })?)
+            }
+            _ => return Err(DeviceError::NotSupported),
+        });
+
+        Ok((dev, interrupts_extended))
+    }
+
+    /// Parse nodes for UART devices.
+    fn parse_uart(
+        &self,
+        node: &Node,
+        comp: &StringList,
+        props: &InheritProps,
+    ) -> DeviceResult<DevWithInterrupt> {
+        let interrupts_extended = parse_interrupts(node, props)?;
+        let base_vaddr = parse_reg(node, props).and_then(|(paddr, size)| {
+            self.io_mapper
+                .query_or_map(paddr as usize, size as usize)
+                .ok_or(DeviceError::NoResources)
+        });
+
+        use crate::uart::*;
+        let dev = Device::Uart(match comp {
+            c if c.contains("ns16550a") => {
+                Arc::new(unsafe { Uart16550Mmio::<u8>::new(base_vaddr?) })
+            }
+            c if c.contains("allwinner,sun20i-uart") => {
+                Arc::new(unsafe { Uart16550Mmio::<u32>::new(base_vaddr?) })
+            }
+            _ => return Err(DeviceError::NotSupported),
+        });
+
+        Ok((dev, interrupts_extended))
+    }
+}
--- a/drivers/src/builder/mod.rs
+++ b/drivers/src/builder/mod.rs
@ -0,0 +1,18 @@
+//! Various builders to probe devices and create corresponding drivers
+//! (e.g. device tree, ACPI table, ...)
+
+mod devicetree;
+
+pub use devicetree::DevicetreeDriverBuilder;
+
+use crate::{PhysAddr, VirtAddr};
+
+/// A trait implemented in kernel to translate device physical addresses to virtual
+/// addresses.
+pub trait IoMapper {
+    /// Translate the device physical address to virtual address. If not mapped
+    /// in the kernel page table, map the region specified by the given `size`.
+    ///
+    /// If an error accurs during translation or mapping, returns `None`.
+    fn query_or_map(&self, paddr: PhysAddr, size: usize) -> Option<VirtAddr>;
+}
--- a/drivers/src/bus/mod.rs
+++ b/drivers/src/bus/mod.rs
@ -0,0 +1,38 @@
+#![allow(unused)]
+
+#[cfg(any(target_arch = "x86_64", target_arch = "riscv64"))]
+pub mod pci;
+
+pub fn phys_to_virt(paddr: PhysAddr) -> VirtAddr {
+    unsafe { drivers_phys_to_virt(paddr) }
+}
+
+pub fn virt_to_phys(vaddr: VirtAddr) -> PhysAddr {
+    unsafe { drivers_virt_to_phys(vaddr) }
+}
+
+extern "C" {
+    fn drivers_dma_alloc(pages: usize) -> PhysAddr;
+    fn drivers_dma_dealloc(paddr: PhysAddr, pages: usize) -> i32;
+    fn drivers_phys_to_virt(paddr: PhysAddr) -> VirtAddr;
+    fn drivers_virt_to_phys(vaddr: VirtAddr) -> PhysAddr;
+}
+
+pub const PAGE_SIZE: usize = 4096;
+
+type VirtAddr = usize;
+type PhysAddr = usize;
+
+use core::ptr::{read_volatile, write_volatile};
+#[inline(always)]
+pub fn write<T>(addr: usize, content: T) {
+    let cell = (addr) as *mut T;
+    unsafe {
+        write_volatile(cell, content);
+    }
+}
+#[inline(always)]
+pub fn read<T>(addr: usize) -> T {
+    let cell = (addr) as *const T;
+    unsafe { read_volatile(cell) }
+}
--- a/drivers/src/bus/pci.rs
+++ b/drivers/src/bus/pci.rs
@ -0,0 +1,327 @@
+use super::{phys_to_virt, PAGE_SIZE};
+use crate::builder::IoMapper;
+use crate::{Device, DeviceError, DeviceResult, VirtAddr};
+use alloc::{collections::BTreeMap, format, sync::Arc, vec::Vec};
+use pci::*;
+use spin::Mutex;
+
+const PCI_COMMAND: u16 = 0x04;
+const BAR0: u16 = 0x10;
+const PCI_CAP_PTR: u16 = 0x34;
+const PCI_INTERRUPT_LINE: u16 = 0x3c;
+const PCI_INTERRUPT_PIN: u16 = 0x3d;
+
+const PCI_MSI_CTRL_CAP: u16 = 0x00;
+const PCI_MSI_ADDR: u16 = 0x04;
+const PCI_MSI_UPPER_ADDR: u16 = 0x08;
+const PCI_MSI_DATA_32: u16 = 0x08;
+const PCI_MSI_DATA_64: u16 = 0x0C;
+
+const PCI_CAP_ID_MSI: u8 = 0x05;
+
+struct PortOpsImpl;
+
+#[cfg(target_arch = "x86_64")]
+use x86_64::instructions::port::Port;
+
+#[cfg(target_arch = "x86_64")]
+impl PortOps for PortOpsImpl {
+    unsafe fn read8(&self, port: u16) -> u8 {
+        Port::new(port).read()
+    }
+    unsafe fn read16(&self, port: u16) -> u16 {
+        Port::new(port).read()
+    }
+    unsafe fn read32(&self, port: u32) -> u32 {
+        Port::new(port as u16).read()
+    }
+    unsafe fn write8(&self, port: u16, val: u8) {
+        Port::new(port).write(val);
+    }
+    unsafe fn write16(&self, port: u16, val: u16) {
+        Port::new(port).write(val);
+    }
+    unsafe fn write32(&self, port: u32, val: u32) {
+        Port::new(port as u16).write(val);
+    }
+}
+
+#[cfg(target_arch = "x86_64")]
+const PCI_BASE: usize = 0; //Fix me
+
+#[cfg(any(target_arch = "mips", target_arch = "riscv64"))]
+use super::{read, write};
+
+#[cfg(feature = "board_malta")]
+const PCI_BASE: usize = 0xbbe00000;
+
+#[cfg(target_arch = "riscv64")]
+const PCI_BASE: usize = 0x30000000;
+#[cfg(target_arch = "riscv64")]
+const E1000_BASE: usize = 0x40000000;
+// riscv64 Qemu
+
+#[cfg(target_arch = "x86_64")]
+const PCI_ACCESS: CSpaceAccessMethod = CSpaceAccessMethod::IO;
+#[cfg(not(target_arch = "x86_64"))]
+const PCI_ACCESS: CSpaceAccessMethod = CSpaceAccessMethod::MemoryMapped(PCI_BASE as *mut u8);
+
+#[cfg(any(target_arch = "mips", target_arch = "riscv64"))]
+impl PortOps for PortOpsImpl {
+    unsafe fn read8(&self, port: u16) -> u8 {
+        read(phys_to_virt(PCI_BASE) + port as usize)
+    }
+    unsafe fn read16(&self, port: u16) -> u16 {
+        read(phys_to_virt(PCI_BASE) + port as usize)
+    }
+    unsafe fn read32(&self, port: u32) -> u32 {
+        read(phys_to_virt(PCI_BASE) + port as usize)
+    }
+    unsafe fn write8(&self, port: u16, val: u8) {
+        write(phys_to_virt(PCI_BASE) + port as usize, val);
+    }
+    unsafe fn write16(&self, port: u16, val: u16) {
+        write(phys_to_virt(PCI_BASE) + port as usize, val);
+    }
+    unsafe fn write32(&self, port: u32, val: u32) {
+        write(phys_to_virt(PCI_BASE) + port as usize, val);
+    }
+}
+
+/// Enable the pci device and its interrupt
+/// Return assigned MSI interrupt number when applicable
+unsafe fn enable(loc: Location, paddr: u64) -> Option<usize> {
+    let ops = &PortOpsImpl;
+    //let am = CSpaceAccessMethod::IO;
+    let am = PCI_ACCESS;
+
+    if paddr != 0 {
+        // reveal PCI regs by setting paddr
+        let bar0_raw = am.read32(ops, loc, BAR0);
+        am.write32(ops, loc, BAR0, (paddr & !0xfff) as u32); //Only for 32-bit decoding
+        debug!(
+            "BAR0 set from {:#x} to {:#x}",
+            bar0_raw,
+            am.read32(ops, loc, BAR0)
+        );
+    }
+
+    // 23 and lower are used
+    static mut MSI_IRQ: u32 = 23;
+
+    let orig = am.read16(ops, loc, PCI_COMMAND);
+    // IO Space | MEM Space | Bus Mastering | Special Cycles | PCI Interrupt Disable
+    am.write32(ops, loc, PCI_COMMAND, (orig | 0x40f) as u32);
+
+    // find MSI cap
+    let mut msi_found = false;
+    let mut cap_ptr = am.read8(ops, loc, PCI_CAP_PTR) as u16;
+    let mut assigned_irq = None;
+    while cap_ptr > 0 {
+        let cap_id = am.read8(ops, loc, cap_ptr);
+        if cap_id == PCI_CAP_ID_MSI {
+            let orig_ctrl = am.read32(ops, loc, cap_ptr + PCI_MSI_CTRL_CAP);
+            // The manual Volume 3 Chapter 10.11 Message Signalled Interrupts
+            // 0 is (usually) the apic id of the bsp.
+            //am.write32(ops, loc, cap_ptr + PCI_MSI_ADDR, 0xfee00000 | (0 << 12));
+            am.write32(ops, loc, cap_ptr + PCI_MSI_ADDR, 0xfee00000);
+            MSI_IRQ += 1;
+            let irq = MSI_IRQ;
+            assigned_irq = Some(irq as usize);
+            // we offset all our irq numbers by 32
+            if (orig_ctrl >> 16) & (1 << 7) != 0 {
+                // 64bit
+                am.write32(ops, loc, cap_ptr + PCI_MSI_DATA_64, irq + 32);
+            } else {
+                // 32bit
+                am.write32(ops, loc, cap_ptr + PCI_MSI_DATA_32, irq + 32);
+            }
+
+            // enable MSI interrupt, assuming 64bit for now
+            am.write32(ops, loc, cap_ptr + PCI_MSI_CTRL_CAP, orig_ctrl | 0x10000);
+            debug!(
+                "MSI control {:#b}, enabling MSI interrupt {}",
+                orig_ctrl >> 16,
+                irq
+            );
+            msi_found = true;
+        }
+        debug!("PCI device has cap id {} at {:#X}", cap_id, cap_ptr);
+        cap_ptr = am.read8(ops, loc, cap_ptr + 1) as u16;
+    }
+
+    if !msi_found {
+        // Use PCI legacy interrupt instead
+        // IO Space | MEM Space | Bus Mastering | Special Cycles
+        am.write32(ops, loc, PCI_COMMAND, (orig | 0xf) as u32);
+        debug!("MSI not found, using PCI interrupt");
+    }
+
+    info!("pci device enable done");
+
+    assigned_irq
+}
+
+pub fn init_driver(dev: &PCIDevice, mapper: &Option<Arc<dyn IoMapper>>) -> DeviceResult<Device> {
+    let name = format!("enp{}s{}f{}", dev.loc.bus, dev.loc.device, dev.loc.function);
+    match (dev.id.vendor_id, dev.id.device_id) {
+        (0x8086, 0x100e) | (0x8086, 0x100f) | (0x8086, 0x10d3) => {
+            // 0x100e
+            // 82540EM Gigabit Ethernet Controller
+            // 0x100f
+            // 82545EM Gigabit Ethernet Controller (Copper)
+            // 0x10d3
+            // 82574L Gigabit Network Connection
+            // (e1000e 8086:10d3)
+            if let Some(BAR::Memory(addr, len, _, _)) = dev.bars[0] {
+                info!("Found e1000e dev {:?} BAR0 {:#x?}", dev, addr);
+                #[cfg(target_arch = "riscv64")]
+                let addr = if addr == 0 { E1000_BASE as u64 } else { addr };
+
+                if let Some(m) = mapper {
+                    m.query_or_map(addr as usize, PAGE_SIZE * 8);
+                }
+                let irq = unsafe { enable(dev.loc, addr) };
+                let vaddr = phys_to_virt(addr as usize);
+                let dev = Device::Net(Arc::new(crate::net::e1000::init(
+                    name,
+                    irq.unwrap_or(0),
+                    vaddr,
+                    len as usize,
+                    0,
+                )?));
+                return Ok(dev);
+            }
+        }
+        (0x8086, 0x10fb) => {
+            // 82599ES 10-Gigabit SFI/SFP+ Network Connection
+            if let Some(BAR::Memory(addr, len, _, _)) = dev.bars[0] {
+                let irq = unsafe { enable(dev.loc, 0) };
+                let vaddr = phys_to_virt(addr as usize);
+                info!("Found ixgbe dev {:#x}, irq: {:?}", vaddr, irq);
+                /*
+                let index = NET_DRIVERS.read().len();
+                PCI_DRIVERS.lock().insert(
+                    dev.loc,
+                    ixgbe::ixgbe_init(name, irq, vaddr, len as usize, index),
+                );
+                */
+                return Err(DeviceError::NotSupported);
+            }
+        }
+        (0x8086, 0x1533) => {
+            if let Some(BAR::Memory(addr, len, _, _)) = dev.bars[0] {
+                info!("Intel Corporation I210 Gigabit Network Connection");
+                info!("DEV: {:?}, BAR0: {:#x}", dev, addr);
+                return Err(DeviceError::NotSupported);
+            }
+        }
+        (0x8086, 0x1539) => {
+            if let Some(BAR::Memory(addr, len, _, _)) = dev.bars[0] {
+                info!(
+                    "Found Intel I211 ethernet controller dev {:?}, addr: {:x?}",
+                    dev, addr
+                );
+                return Err(DeviceError::NotSupported);
+            }
+        }
+        _ => {}
+    }
+    if dev.id.class == 0x01 && dev.id.subclass == 0x06 {
+        // Mass storage class
+        // SATA subclass
+        if let Some(BAR::Memory(addr, len, _, _)) = dev.bars[5] {
+            info!("Found AHCI dev {:?} BAR5 {:x?}", dev, addr);
+            /*
+            let irq = unsafe { enable(dev.loc) };
+            assert!(len as usize <= PAGE_SIZE);
+            let vaddr = phys_to_virt(addr as usize);
+            if let Some(driver) = ahci::init(irq, vaddr, len as usize) {
+                PCI_DRIVERS.lock().insert(dev.loc, driver);
+            }
+            */
+            return Err(DeviceError::NotSupported);
+        }
+    }
+
+    Err(DeviceError::NoResources)
+}
+
+pub fn detach_driver(loc: &Location) -> bool {
+    /*
+    match PCI_DRIVERS.lock().remove(loc) {
+        Some(driver) => {
+            DRIVERS
+                .write()
+                .retain(|dri| dri.get_id() != driver.get_id());
+            NET_DRIVERS
+                .write()
+                .retain(|dri| dri.get_id() != driver.get_id());
+            true
+        }
+        None => false,
+    }
+    */
+    false
+}
+
+pub fn init(mapper: Option<Arc<dyn IoMapper>>) -> DeviceResult<Vec<Device>> {
+    let mapper_driver = if let Some(m) = mapper {
+        m.query_or_map(PCI_BASE, PAGE_SIZE * 256 * 32 * 8);
+        Some(m)
+    } else {
+        None
+    };
+
+    let mut dev_list = Vec::new();
+    let pci_iter = unsafe { scan_bus(&PortOpsImpl, PCI_ACCESS) };
+    info!("");
+    info!("--------- PCI bus:device:function ---------");
+    for dev in pci_iter {
+        info!(
+            "pci: {}:{}:{} {:04x}:{:04x} ({} {}) irq: {}:{:?}",
+            dev.loc.bus,
+            dev.loc.device,
+            dev.loc.function,
+            dev.id.vendor_id,
+            dev.id.device_id,
+            dev.id.class,
+            dev.id.subclass,
+            dev.pic_interrupt_line,
+            dev.interrupt_pin,
+        );
+        let res = init_driver(&dev, &mapper_driver);
+        match res {
+            Ok(d) => dev_list.push(d),
+            Err(e) => warn!(
+                "{:?}, failed to initialize PCI device: {:04x}:{:04x}",
+                e, dev.id.vendor_id, dev.id.device_id
+            ),
+        }
+    }
+    info!("---------");
+    info!("");
+
+    Ok(dev_list)
+}
+
+pub fn find_device(vendor: u16, product: u16) -> Option<Location> {
+    let pci_iter = unsafe { scan_bus(&PortOpsImpl, PCI_ACCESS) };
+    for dev in pci_iter {
+        if dev.id.vendor_id == vendor && dev.id.device_id == product {
+            return Some(dev.loc);
+        }
+    }
+    None
+}
+
+pub fn get_bar0_mem(loc: Location) -> Option<(usize, usize)> {
+    unsafe { probe_function(&PortOpsImpl, loc, PCI_ACCESS) }
+        .and_then(|dev| dev.bars[0])
+        .map(|bar| match bar {
+            BAR::Memory(addr, len, _, _) => (addr as usize, len as usize),
+            _ => unimplemented!(),
+        })
+}
+
+// all devices stored in：AllDeviceList
--- a/drivers/src/display/mod.rs
+++ b/drivers/src/display/mod.rs
@ -0,0 +1,5 @@
+//! Only UEFI Display currently.
+
+mod uefi;
+
+pub use uefi::UefiDisplay;
--- a/drivers/src/display/resource/cursor.bin
+++ b/drivers/src/display/resource/cursor.bin
--- a/drivers/src/display/uefi.rs
+++ b/drivers/src/display/uefi.rs
@ -0,0 +1,34 @@
+//! UEFI Graphics Output Protocol
+
+use crate::prelude::{DisplayInfo, FrameBuffer};
+use crate::scheme::{DisplayScheme, Scheme};
+
+pub struct UefiDisplay {
+    info: DisplayInfo,
+}
+
+impl UefiDisplay {
+    pub fn new(info: DisplayInfo) -> Self {
+        Self { info }
+    }
+}
+
+impl Scheme for UefiDisplay {
+    fn name(&self) -> &str {
+        "mock-display"
+    }
+}
+
+impl DisplayScheme for UefiDisplay {
+    #[inline]
+    fn info(&self) -> DisplayInfo {
+        self.info
+    }
+
+    #[inline]
+    fn fb(&self) -> FrameBuffer {
+        unsafe {
+            FrameBuffer::from_raw_parts_mut(self.info.fb_base_vaddr as *mut u8, self.info.fb_size)
+        }
+    }
+}
--- a/drivers/src/input/input_event_codes.rs
+++ b/drivers/src/input/input_event_codes.rs
@ -0,0 +1,808 @@
+//! Linux input event codes.
+//!
+//! Reference: <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/input-event-codes.h>
+
+#![allow(dead_code)]
+#![allow(unused_parens)]
+
+/// Device properties and quirks
+pub mod input_prop {
+    /// needs a pointer
+    pub const INPUT_PROP_POINTER: u16 = 0x00;
+    /// direct input devices
+    pub const INPUT_PROP_DIRECT: u16 = 0x01;
+    /// has button(s) under pad
+    pub const INPUT_PROP_BUTTONPAD: u16 = 0x02;
+    /// touch rectangle only
+    pub const INPUT_PROP_SEMI_MT: u16 = 0x03;
+    /// softbuttons at top of pad
+    pub const INPUT_PROP_TOPBUTTONPAD: u16 = 0x04;
+    /// is a pointing stick
+    pub const INPUT_PROP_POINTING_STICK: u16 = 0x05;
+    /// has accelerometer
+    pub const INPUT_PROP_ACCELEROMETER: u16 = 0x06;
+
+    pub const INPUT_PROP_MAX: u16 = 0x1f;
+    pub const INPUT_PROP_CNT: u16 = (INPUT_PROP_MAX + 1);
+}
+
+/// Event types
+pub mod ev {
+    pub const EV_SYN: u16 = 0x00;
+    pub const EV_KEY: u16 = 0x01;
+    pub const EV_REL: u16 = 0x02;
+    pub const EV_ABS: u16 = 0x03;
+    pub const EV_MSC: u16 = 0x04;
+    pub const EV_SW: u16 = 0x05;
+    pub const EV_LED: u16 = 0x11;
+    pub const EV_SND: u16 = 0x12;
+    pub const EV_REP: u16 = 0x14;
+    pub const EV_FF: u16 = 0x15;
+    pub const EV_PWR: u16 = 0x16;
+    pub const EV_FF_STATUS: u16 = 0x17;
+    pub const EV_MAX: u16 = 0x1f;
+    pub const EV_CNT: u16 = (EV_MAX + 1);
+}
+
+/// Synchronization events
+pub mod syn {
+    pub const SYN_REPORT: u16 = 0;
+    pub const SYN_CONFIG: u16 = 1;
+    pub const SYN_MT_REPORT: u16 = 2;
+    pub const SYN_DROPPED: u16 = 3;
+    pub const SYN_MAX: u16 = 0xf;
+    pub const SYN_CNT: u16 = (SYN_MAX + 1);
+}
+
+/// Keys and buttons
+pub mod key {
+    pub const KEY_RESERVED: u16 = 0;
+    pub const KEY_ESC: u16 = 1;
+    pub const KEY_1: u16 = 2;
+    pub const KEY_2: u16 = 3;
+    pub const KEY_3: u16 = 4;
+    pub const KEY_4: u16 = 5;
+    pub const KEY_5: u16 = 6;
+    pub const KEY_6: u16 = 7;
+    pub const KEY_7: u16 = 8;
+    pub const KEY_8: u16 = 9;
+    pub const KEY_9: u16 = 10;
+    pub const KEY_0: u16 = 11;
+    pub const KEY_MINUS: u16 = 12;
+    pub const KEY_EQUAL: u16 = 13;
+    pub const KEY_BACKSPACE: u16 = 14;
+    pub const KEY_TAB: u16 = 15;
+    pub const KEY_Q: u16 = 16;
+    pub const KEY_W: u16 = 17;
+    pub const KEY_E: u16 = 18;
+    pub const KEY_R: u16 = 19;
+    pub const KEY_T: u16 = 20;
+    pub const KEY_Y: u16 = 21;
+    pub const KEY_U: u16 = 22;
+    pub const KEY_I: u16 = 23;
+    pub const KEY_O: u16 = 24;
+    pub const KEY_P: u16 = 25;
+    pub const KEY_LEFTBRACE: u16 = 26;
+    pub const KEY_RIGHTBRACE: u16 = 27;
+    pub const KEY_ENTER: u16 = 28;
+    pub const KEY_LEFTCTRL: u16 = 29;
+    pub const KEY_A: u16 = 30;
+    pub const KEY_S: u16 = 31;
+    pub const KEY_D: u16 = 32;
+    pub const KEY_F: u16 = 33;
+    pub const KEY_G: u16 = 34;
+    pub const KEY_H: u16 = 35;
+    pub const KEY_J: u16 = 36;
+    pub const KEY_K: u16 = 37;
+    pub const KEY_L: u16 = 38;
+    pub const KEY_SEMICOLON: u16 = 39;
+    pub const KEY_APOSTROPHE: u16 = 40;
+    pub const KEY_GRAVE: u16 = 41;
+    pub const KEY_LEFTSHIFT: u16 = 42;
+    pub const KEY_BACKSLASH: u16 = 43;
+    pub const KEY_Z: u16 = 44;
+    pub const KEY_X: u16 = 45;
+    pub const KEY_C: u16 = 46;
+    pub const KEY_V: u16 = 47;
+    pub const KEY_B: u16 = 48;
+    pub const KEY_N: u16 = 49;
+    pub const KEY_M: u16 = 50;
+    pub const KEY_COMMA: u16 = 51;
+    pub const KEY_DOT: u16 = 52;
+    pub const KEY_SLASH: u16 = 53;
+    pub const KEY_RIGHTSHIFT: u16 = 54;
+    pub const KEY_KPASTERISK: u16 = 55;
+    pub const KEY_LEFTALT: u16 = 56;
+    pub const KEY_SPACE: u16 = 57;
+    pub const KEY_CAPSLOCK: u16 = 58;
+    pub const KEY_F1: u16 = 59;
+    pub const KEY_F2: u16 = 60;
+    pub const KEY_F3: u16 = 61;
+    pub const KEY_F4: u16 = 62;
+    pub const KEY_F5: u16 = 63;
+    pub const KEY_F6: u16 = 64;
+    pub const KEY_F7: u16 = 65;
+    pub const KEY_F8: u16 = 66;
+    pub const KEY_F9: u16 = 67;
+    pub const KEY_F10: u16 = 68;
+    pub const KEY_NUMLOCK: u16 = 69;
+    pub const KEY_SCROLLLOCK: u16 = 70;
+    pub const KEY_KP7: u16 = 71;
+    pub const KEY_KP8: u16 = 72;
+    pub const KEY_KP9: u16 = 73;
+    pub const KEY_KPMINUS: u16 = 74;
+    pub const KEY_KP4: u16 = 75;
+    pub const KEY_KP5: u16 = 76;
+    pub const KEY_KP6: u16 = 77;
+    pub const KEY_KPPLUS: u16 = 78;
+    pub const KEY_KP1: u16 = 79;
+    pub const KEY_KP2: u16 = 80;
+    pub const KEY_KP3: u16 = 81;
+    pub const KEY_KP0: u16 = 82;
+    pub const KEY_KPDOT: u16 = 83;
+
+    pub const KEY_ZENKAKUHANKAKU: u16 = 85;
+    pub const KEY_102ND: u16 = 86;
+    pub const KEY_F11: u16 = 87;
+    pub const KEY_F12: u16 = 88;
+    pub const KEY_RO: u16 = 89;
+    pub const KEY_KATAKANA: u16 = 90;
+    pub const KEY_HIRAGANA: u16 = 91;
+    pub const KEY_HENKAN: u16 = 92;
+    pub const KEY_KATAKANAHIRAGANA: u16 = 93;
+    pub const KEY_MUHENKAN: u16 = 94;
+    pub const KEY_KPJPCOMMA: u16 = 95;
+    pub const KEY_KPENTER: u16 = 96;
+    pub const KEY_RIGHTCTRL: u16 = 97;
+    pub const KEY_KPSLASH: u16 = 98;
+    pub const KEY_SYSRQ: u16 = 99;
+    pub const KEY_RIGHTALT: u16 = 100;
+    pub const KEY_LINEFEED: u16 = 101;
+    pub const KEY_HOME: u16 = 102;
+    pub const KEY_UP: u16 = 103;
+    pub const KEY_PAGEUP: u16 = 104;
+    pub const KEY_LEFT: u16 = 105;
+    pub const KEY_RIGHT: u16 = 106;
+    pub const KEY_END: u16 = 107;
+    pub const KEY_DOWN: u16 = 108;
+    pub const KEY_PAGEDOWN: u16 = 109;
+    pub const KEY_INSERT: u16 = 110;
+    pub const KEY_DELETE: u16 = 111;
+    pub const KEY_MACRO: u16 = 112;
+    pub const KEY_MUTE: u16 = 113;
+    pub const KEY_VOLUMEDOWN: u16 = 114;
+    pub const KEY_VOLUMEUP: u16 = 115;
+    pub const KEY_POWER: u16 = 116;
+    pub const KEY_KPEQUAL: u16 = 117;
+    pub const KEY_KPPLUSMINUS: u16 = 118;
+    pub const KEY_PAUSE: u16 = 119;
+    pub const KEY_SCALE: u16 = 120;
+
+    pub const KEY_KPCOMMA: u16 = 121;
+    pub const KEY_HANGEUL: u16 = 122;
+    pub const KEY_HANGUEL: u16 = KEY_HANGEUL;
+    pub const KEY_HANJA: u16 = 123;
+    pub const KEY_YEN: u16 = 124;
+    pub const KEY_LEFTMETA: u16 = 125;
+    pub const KEY_RIGHTMETA: u16 = 126;
+    pub const KEY_COMPOSE: u16 = 127;
+
+    pub const KEY_STOP: u16 = 128;
+    pub const KEY_AGAIN: u16 = 129;
+    pub const KEY_PROPS: u16 = 130;
+    pub const KEY_UNDO: u16 = 131;
+    pub const KEY_FRONT: u16 = 132;
+    pub const KEY_COPY: u16 = 133;
+    pub const KEY_OPEN: u16 = 134;
+    pub const KEY_PASTE: u16 = 135;
+    pub const KEY_FIND: u16 = 136;
+    pub const KEY_CUT: u16 = 137;
+    pub const KEY_HELP: u16 = 138;
+    pub const KEY_MENU: u16 = 139;
+    pub const KEY_CALC: u16 = 140;
+    pub const KEY_SETUP: u16 = 141;
+    pub const KEY_SLEEP: u16 = 142;
+    pub const KEY_WAKEUP: u16 = 143;
+    pub const KEY_FILE: u16 = 144;
+    pub const KEY_SENDFILE: u16 = 145;
+    pub const KEY_DELETEFILE: u16 = 146;
+    pub const KEY_XFER: u16 = 147;
+    pub const KEY_PROG1: u16 = 148;
+    pub const KEY_PROG2: u16 = 149;
+    pub const KEY_WWW: u16 = 150;
+    pub const KEY_MSDOS: u16 = 151;
+    pub const KEY_COFFEE: u16 = 152;
+    pub const KEY_SCREENLOCK: u16 = KEY_COFFEE;
+    pub const KEY_ROTATE_DISPLAY: u16 = 153;
+    pub const KEY_DIRECTION: u16 = KEY_ROTATE_DISPLAY;
+    pub const KEY_CYCLEWINDOWS: u16 = 154;
+    pub const KEY_MAIL: u16 = 155;
+    pub const KEY_BOOKMARKS: u16 = 156;
+    pub const KEY_COMPUTER: u16 = 157;
+    pub const KEY_BACK: u16 = 158;
+    pub const KEY_FORWARD: u16 = 159;
+    pub const KEY_CLOSECD: u16 = 160;
+    pub const KEY_EJECTCD: u16 = 161;
+    pub const KEY_EJECTCLOSECD: u16 = 162;
+    pub const KEY_NEXTSONG: u16 = 163;
+    pub const KEY_PLAYPAUSE: u16 = 164;
+    pub const KEY_PREVIOUSSONG: u16 = 165;
+    pub const KEY_STOPCD: u16 = 166;
+    pub const KEY_RECORD: u16 = 167;
+    pub const KEY_REWIND: u16 = 168;
+    pub const KEY_PHONE: u16 = 169;
+    pub const KEY_ISO: u16 = 170;
+    pub const KEY_CONFIG: u16 = 171;
+    pub const KEY_HOMEPAGE: u16 = 172;
+    pub const KEY_REFRESH: u16 = 173;
+    pub const KEY_EXIT: u16 = 174;
+    pub const KEY_MOVE: u16 = 175;
+    pub const KEY_EDIT: u16 = 176;
+    pub const KEY_SCROLLUP: u16 = 177;
+    pub const KEY_SCROLLDOWN: u16 = 178;
+    pub const KEY_KPLEFTPAREN: u16 = 179;
+    pub const KEY_KPRIGHTPAREN: u16 = 180;
+    pub const KEY_NEW: u16 = 181;
+    pub const KEY_REDO: u16 = 182;
+
+    pub const KEY_F13: u16 = 183;
+    pub const KEY_F14: u16 = 184;
+    pub const KEY_F15: u16 = 185;
+    pub const KEY_F16: u16 = 186;
+    pub const KEY_F17: u16 = 187;
+    pub const KEY_F18: u16 = 188;
+    pub const KEY_F19: u16 = 189;
+    pub const KEY_F20: u16 = 190;
+    pub const KEY_F21: u16 = 191;
+    pub const KEY_F22: u16 = 192;
+    pub const KEY_F23: u16 = 193;
+    pub const KEY_F24: u16 = 194;
+
+    pub const KEY_PLAYCD: u16 = 200;
+    pub const KEY_PAUSECD: u16 = 201;
+    pub const KEY_PROG3: u16 = 202;
+    pub const KEY_PROG4: u16 = 203;
+    pub const KEY_DASHBOARD: u16 = 204;
+    pub const KEY_SUSPEND: u16 = 205;
+    pub const KEY_CLOSE: u16 = 206;
+    pub const KEY_PLAY: u16 = 207;
+    pub const KEY_FASTFORWARD: u16 = 208;
+    pub const KEY_BASSBOOST: u16 = 209;
+    pub const KEY_PRINT: u16 = 210;
+    pub const KEY_HP: u16 = 211;
+    pub const KEY_CAMERA: u16 = 212;
+    pub const KEY_SOUND: u16 = 213;
+    pub const KEY_QUESTION: u16 = 214;
+    pub const KEY_EMAIL: u16 = 215;
+    pub const KEY_CHAT: u16 = 216;
+    pub const KEY_SEARCH: u16 = 217;
+    pub const KEY_CONNECT: u16 = 218;
+    pub const KEY_FINANCE: u16 = 219;
+    pub const KEY_SPORT: u16 = 220;
+    pub const KEY_SHOP: u16 = 221;
+    pub const KEY_ALTERASE: u16 = 222;
+    pub const KEY_CANCEL: u16 = 223;
+    pub const KEY_BRIGHTNESSDOWN: u16 = 224;
+    pub const KEY_BRIGHTNESSUP: u16 = 225;
+    pub const KEY_MEDIA: u16 = 226;
+
+    pub const KEY_SWITCHVIDEOMODE: u16 = 227;
+    pub const KEY_KBDILLUMTOGGLE: u16 = 228;
+    pub const KEY_KBDILLUMDOWN: u16 = 229;
+    pub const KEY_KBDILLUMUP: u16 = 230;
+
+    pub const KEY_SEND: u16 = 231;
+    pub const KEY_REPLY: u16 = 232;
+    pub const KEY_FORWARDMAIL: u16 = 233;
+    pub const KEY_SAVE: u16 = 234;
+    pub const KEY_DOCUMENTS: u16 = 235;
+
+    pub const KEY_BATTERY: u16 = 236;
+
+    pub const KEY_BLUETOOTH: u16 = 237;
+    pub const KEY_WLAN: u16 = 238;
+    pub const KEY_UWB: u16 = 239;
+
+    pub const KEY_UNKNOWN: u16 = 240;
+
+    pub const KEY_VIDEO_NEXT: u16 = 241;
+    pub const KEY_VIDEO_PREV: u16 = 242;
+    pub const KEY_BRIGHTNESS_CYCLE: u16 = 243;
+    pub const KEY_BRIGHTNESS_AUTO: u16 = 244;
+    pub const KEY_BRIGHTNESS_ZERO: u16 = KEY_BRIGHTNESS_AUTO;
+    pub const KEY_DISPLAY_OFF: u16 = 245;
+
+    pub const KEY_WWAN: u16 = 246;
+    pub const KEY_WIMAX: u16 = KEY_WWAN;
+    pub const KEY_RFKILL: u16 = 247;
+
+    pub const KEY_MICMUTE: u16 = 248;
+
+    pub const BTN_MISC: u16 = 0x100;
+    pub const BTN_0: u16 = 0x100;
+    pub const BTN_1: u16 = 0x101;
+    pub const BTN_2: u16 = 0x102;
+    pub const BTN_3: u16 = 0x103;
+    pub const BTN_4: u16 = 0x104;
+    pub const BTN_5: u16 = 0x105;
+    pub const BTN_6: u16 = 0x106;
+    pub const BTN_7: u16 = 0x107;
+    pub const BTN_8: u16 = 0x108;
+    pub const BTN_9: u16 = 0x109;
+
+    pub const BTN_MOUSE: u16 = 0x110;
+    pub const BTN_LEFT: u16 = 0x110;
+    pub const BTN_RIGHT: u16 = 0x111;
+    pub const BTN_MIDDLE: u16 = 0x112;
+    pub const BTN_SIDE: u16 = 0x113;
+    pub const BTN_EXTRA: u16 = 0x114;
+    pub const BTN_FORWARD: u16 = 0x115;
+    pub const BTN_BACK: u16 = 0x116;
+    pub const BTN_TASK: u16 = 0x117;
+
+    pub const BTN_JOYSTICK: u16 = 0x120;
+    pub const BTN_TRIGGER: u16 = 0x120;
+    pub const BTN_THUMB: u16 = 0x121;
+    pub const BTN_THUMB2: u16 = 0x122;
+    pub const BTN_TOP: u16 = 0x123;
+    pub const BTN_TOP2: u16 = 0x124;
+    pub const BTN_PINKIE: u16 = 0x125;
+    pub const BTN_BASE: u16 = 0x126;
+    pub const BTN_BASE2: u16 = 0x127;
+    pub const BTN_BASE3: u16 = 0x128;
+    pub const BTN_BASE4: u16 = 0x129;
+    pub const BTN_BASE5: u16 = 0x12a;
+    pub const BTN_BASE6: u16 = 0x12b;
+    pub const BTN_DEAD: u16 = 0x12f;
+
+    pub const BTN_GAMEPAD: u16 = 0x130;
+    pub const BTN_SOUTH: u16 = 0x130;
+    pub const BTN_A: u16 = BTN_SOUTH;
+    pub const BTN_EAST: u16 = 0x131;
+    pub const BTN_B: u16 = BTN_EAST;
+    pub const BTN_C: u16 = 0x132;
+    pub const BTN_NORTH: u16 = 0x133;
+    pub const BTN_X: u16 = BTN_NORTH;
+    pub const BTN_WEST: u16 = 0x134;
+    pub const BTN_Y: u16 = BTN_WEST;
+    pub const BTN_Z: u16 = 0x135;
+    pub const BTN_TL: u16 = 0x136;
+    pub const BTN_TR: u16 = 0x137;
+    pub const BTN_TL2: u16 = 0x138;
+    pub const BTN_TR2: u16 = 0x139;
+    pub const BTN_SELECT: u16 = 0x13a;
+    pub const BTN_START: u16 = 0x13b;
+    pub const BTN_MODE: u16 = 0x13c;
+    pub const BTN_THUMBL: u16 = 0x13d;
+    pub const BTN_THUMBR: u16 = 0x13e;
+
+    pub const BTN_DIGI: u16 = 0x140;
+    pub const BTN_TOOL_PEN: u16 = 0x140;
+    pub const BTN_TOOL_RUBBER: u16 = 0x141;
+    pub const BTN_TOOL_BRUSH: u16 = 0x142;
+    pub const BTN_TOOL_PENCIL: u16 = 0x143;
+    pub const BTN_TOOL_AIRBRUSH: u16 = 0x144;
+    pub const BTN_TOOL_FINGER: u16 = 0x145;
+    pub const BTN_TOOL_MOUSE: u16 = 0x146;
+    pub const BTN_TOOL_LENS: u16 = 0x147;
+    pub const BTN_TOOL_QUINTTAP: u16 = 0x148;
+    pub const BTN_STYLUS3: u16 = 0x149;
+    pub const BTN_TOUCH: u16 = 0x14a;
+    pub const BTN_STYLUS: u16 = 0x14b;
+    pub const BTN_STYLUS2: u16 = 0x14c;
+    pub const BTN_TOOL_DOUBLETAP: u16 = 0x14d;
+    pub const BTN_TOOL_TRIPLETAP: u16 = 0x14e;
+    pub const BTN_TOOL_QUADTAP: u16 = 0x14f;
+
+    pub const BTN_WHEEL: u16 = 0x150;
+    pub const BTN_GEAR_DOWN: u16 = 0x150;
+    pub const BTN_GEAR_UP: u16 = 0x151;
+
+    pub const KEY_OK: u16 = 0x160;
+    pub const KEY_SELECT: u16 = 0x161;
+    pub const KEY_GOTO: u16 = 0x162;
+    pub const KEY_CLEAR: u16 = 0x163;
+    pub const KEY_POWER2: u16 = 0x164;
+    pub const KEY_OPTION: u16 = 0x165;
+    pub const KEY_INFO: u16 = 0x166;
+    pub const KEY_TIME: u16 = 0x167;
+    pub const KEY_VENDOR: u16 = 0x168;
+    pub const KEY_ARCHIVE: u16 = 0x169;
+    pub const KEY_PROGRAM: u16 = 0x16a;
+    pub const KEY_CHANNEL: u16 = 0x16b;
+    pub const KEY_FAVORITES: u16 = 0x16c;
+    pub const KEY_EPG: u16 = 0x16d;
+    pub const KEY_PVR: u16 = 0x16e;
+    pub const KEY_MHP: u16 = 0x16f;
+    pub const KEY_LANGUAGE: u16 = 0x170;
+    pub const KEY_TITLE: u16 = 0x171;
+    pub const KEY_SUBTITLE: u16 = 0x172;
+    pub const KEY_ANGLE: u16 = 0x173;
+    pub const KEY_FULL_SCREEN: u16 = 0x174;
+    pub const KEY_ZOOM: u16 = KEY_FULL_SCREEN;
+    pub const KEY_MODE: u16 = 0x175;
+    pub const KEY_KEYBOARD: u16 = 0x176;
+    pub const KEY_ASPECT_RATIO: u16 = 0x177;
+    pub const KEY_SCREEN: u16 = KEY_ASPECT_RATIO;
+    pub const KEY_PC: u16 = 0x178;
+    pub const KEY_TV: u16 = 0x179;
+    pub const KEY_TV2: u16 = 0x17a;
+    pub const KEY_VCR: u16 = 0x17b;
+    pub const KEY_VCR2: u16 = 0x17c;
+    pub const KEY_SAT: u16 = 0x17d;
+    pub const KEY_SAT2: u16 = 0x17e;
+    pub const KEY_CD: u16 = 0x17f;
+    pub const KEY_TAPE: u16 = 0x180;
+    pub const KEY_RADIO: u16 = 0x181;
+    pub const KEY_TUNER: u16 = 0x182;
+    pub const KEY_PLAYER: u16 = 0x183;
+    pub const KEY_TEXT: u16 = 0x184;
+    pub const KEY_DVD: u16 = 0x185;
+    pub const KEY_AUX: u16 = 0x186;
+    pub const KEY_MP3: u16 = 0x187;
+    pub const KEY_AUDIO: u16 = 0x188;
+    pub const KEY_VIDEO: u16 = 0x189;
+    pub const KEY_DIRECTORY: u16 = 0x18a;
+    pub const KEY_LIST: u16 = 0x18b;
+    pub const KEY_MEMO: u16 = 0x18c;
+    pub const KEY_CALENDAR: u16 = 0x18d;
+    pub const KEY_RED: u16 = 0x18e;
+    pub const KEY_GREEN: u16 = 0x18f;
+    pub const KEY_YELLOW: u16 = 0x190;
+    pub const KEY_BLUE: u16 = 0x191;
+    pub const KEY_CHANNELUP: u16 = 0x192;
+    pub const KEY_CHANNELDOWN: u16 = 0x193;
+    pub const KEY_FIRST: u16 = 0x194;
+    pub const KEY_LAST: u16 = 0x195;
+    pub const KEY_AB: u16 = 0x196;
+    pub const KEY_NEXT: u16 = 0x197;
+    pub const KEY_RESTART: u16 = 0x198;
+    pub const KEY_SLOW: u16 = 0x199;
+    pub const KEY_SHUFFLE: u16 = 0x19a;
+    pub const KEY_BREAK: u16 = 0x19b;
+    pub const KEY_PREVIOUS: u16 = 0x19c;
+    pub const KEY_DIGITS: u16 = 0x19d;
+    pub const KEY_TEEN: u16 = 0x19e;
+    pub const KEY_TWEN: u16 = 0x19f;
+    pub const KEY_VIDEOPHONE: u16 = 0x1a0;
+    pub const KEY_GAMES: u16 = 0x1a1;
+    pub const KEY_ZOOMIN: u16 = 0x1a2;
+    pub const KEY_ZOOMOUT: u16 = 0x1a3;
+    pub const KEY_ZOOMRESET: u16 = 0x1a4;
+    pub const KEY_WORDPROCESSOR: u16 = 0x1a5;
+    pub const KEY_EDITOR: u16 = 0x1a6;
+    pub const KEY_SPREADSHEET: u16 = 0x1a7;
+    pub const KEY_GRAPHICSEDITOR: u16 = 0x1a8;
+    pub const KEY_PRESENTATION: u16 = 0x1a9;
+    pub const KEY_DATABASE: u16 = 0x1aa;
+    pub const KEY_NEWS: u16 = 0x1ab;
+    pub const KEY_VOICEMAIL: u16 = 0x1ac;
+    pub const KEY_ADDRESSBOOK: u16 = 0x1ad;
+    pub const KEY_MESSENGER: u16 = 0x1ae;
+    pub const KEY_DISPLAYTOGGLE: u16 = 0x1af;
+    pub const KEY_BRIGHTNESS_TOGGLE: u16 = KEY_DISPLAYTOGGLE;
+    pub const KEY_SPELLCHECK: u16 = 0x1b0;
+    pub const KEY_LOGOFF: u16 = 0x1b1;
+
+    pub const KEY_DOLLAR: u16 = 0x1b2;
+    pub const KEY_EURO: u16 = 0x1b3;
+
+    pub const KEY_FRAMEBACK: u16 = 0x1b4;
+    pub const KEY_FRAMEFORWARD: u16 = 0x1b5;
+    pub const KEY_CONTEXT_MENU: u16 = 0x1b6;
+    pub const KEY_MEDIA_REPEAT: u16 = 0x1b7;
+    pub const KEY_10CHANNELSUP: u16 = 0x1b8;
+    pub const KEY_10CHANNELSDOWN: u16 = 0x1b9;
+    pub const KEY_IMAGES: u16 = 0x1ba;
+
+    pub const KEY_DEL_EOL: u16 = 0x1c0;
+    pub const KEY_DEL_EOS: u16 = 0x1c1;
+    pub const KEY_INS_LINE: u16 = 0x1c2;
+    pub const KEY_DEL_LINE: u16 = 0x1c3;
+
+    pub const KEY_FN: u16 = 0x1d0;
+    pub const KEY_FN_ESC: u16 = 0x1d1;
+    pub const KEY_FN_F1: u16 = 0x1d2;
+    pub const KEY_FN_F2: u16 = 0x1d3;
+    pub const KEY_FN_F3: u16 = 0x1d4;
+    pub const KEY_FN_F4: u16 = 0x1d5;
+    pub const KEY_FN_F5: u16 = 0x1d6;
+    pub const KEY_FN_F6: u16 = 0x1d7;
+    pub const KEY_FN_F7: u16 = 0x1d8;
+    pub const KEY_FN_F8: u16 = 0x1d9;
+    pub const KEY_FN_F9: u16 = 0x1da;
+    pub const KEY_FN_F10: u16 = 0x1db;
+    pub const KEY_FN_F11: u16 = 0x1dc;
+    pub const KEY_FN_F12: u16 = 0x1dd;
+    pub const KEY_FN_1: u16 = 0x1de;
+    pub const KEY_FN_2: u16 = 0x1df;
+    pub const KEY_FN_D: u16 = 0x1e0;
+    pub const KEY_FN_E: u16 = 0x1e1;
+    pub const KEY_FN_F: u16 = 0x1e2;
+    pub const KEY_FN_S: u16 = 0x1e3;
+    pub const KEY_FN_B: u16 = 0x1e4;
+
+    pub const KEY_BRL_DOT1: u16 = 0x1f1;
+    pub const KEY_BRL_DOT2: u16 = 0x1f2;
+    pub const KEY_BRL_DOT3: u16 = 0x1f3;
+    pub const KEY_BRL_DOT4: u16 = 0x1f4;
+    pub const KEY_BRL_DOT5: u16 = 0x1f5;
+    pub const KEY_BRL_DOT6: u16 = 0x1f6;
+    pub const KEY_BRL_DOT7: u16 = 0x1f7;
+    pub const KEY_BRL_DOT8: u16 = 0x1f8;
+    pub const KEY_BRL_DOT9: u16 = 0x1f9;
+    pub const KEY_BRL_DOT10: u16 = 0x1fa;
+
+    pub const KEY_NUMERIC_0: u16 = 0x200;
+    pub const KEY_NUMERIC_1: u16 = 0x201;
+    pub const KEY_NUMERIC_2: u16 = 0x202;
+    pub const KEY_NUMERIC_3: u16 = 0x203;
+    pub const KEY_NUMERIC_4: u16 = 0x204;
+    pub const KEY_NUMERIC_5: u16 = 0x205;
+    pub const KEY_NUMERIC_6: u16 = 0x206;
+    pub const KEY_NUMERIC_7: u16 = 0x207;
+    pub const KEY_NUMERIC_8: u16 = 0x208;
+    pub const KEY_NUMERIC_9: u16 = 0x209;
+    pub const KEY_NUMERIC_STAR: u16 = 0x20a;
+    pub const KEY_NUMERIC_POUND: u16 = 0x20b;
+    pub const KEY_NUMERIC_A: u16 = 0x20c;
+    pub const KEY_NUMERIC_B: u16 = 0x20d;
+    pub const KEY_NUMERIC_C: u16 = 0x20e;
+    pub const KEY_NUMERIC_D: u16 = 0x20f;
+
+    pub const KEY_CAMERA_FOCUS: u16 = 0x210;
+    pub const KEY_WPS_BUTTON: u16 = 0x211;
+
+    pub const KEY_TOUCHPAD_TOGGLE: u16 = 0x212;
+    pub const KEY_TOUCHPAD_ON: u16 = 0x213;
+    pub const KEY_TOUCHPAD_OFF: u16 = 0x214;
+
+    pub const KEY_CAMERA_ZOOMIN: u16 = 0x215;
+    pub const KEY_CAMERA_ZOOMOUT: u16 = 0x216;
+    pub const KEY_CAMERA_UP: u16 = 0x217;
+    pub const KEY_CAMERA_DOWN: u16 = 0x218;
+    pub const KEY_CAMERA_LEFT: u16 = 0x219;
+    pub const KEY_CAMERA_RIGHT: u16 = 0x21a;
+
+    pub const KEY_ATTENDANT_ON: u16 = 0x21b;
+    pub const KEY_ATTENDANT_OFF: u16 = 0x21c;
+    pub const KEY_ATTENDANT_TOGGLE: u16 = 0x21d;
+    pub const KEY_LIGHTS_TOGGLE: u16 = 0x21e;
+
+    pub const BTN_DPAD_UP: u16 = 0x220;
+    pub const BTN_DPAD_DOWN: u16 = 0x221;
+    pub const BTN_DPAD_LEFT: u16 = 0x222;
+    pub const BTN_DPAD_RIGHT: u16 = 0x223;
+
+    pub const KEY_ALS_TOGGLE: u16 = 0x230;
+    pub const KEY_ROTATE_LOCK_TOGGLE: u16 = 0x231;
+
+    pub const KEY_BUTTONCONFIG: u16 = 0x240;
+    pub const KEY_TASKMANAGER: u16 = 0x241;
+    pub const KEY_JOURNAL: u16 = 0x242;
+    pub const KEY_CONTROLPANEL: u16 = 0x243;
+    pub const KEY_APPSELECT: u16 = 0x244;
+    pub const KEY_SCREENSAVER: u16 = 0x245;
+    pub const KEY_VOICECOMMAND: u16 = 0x246;
+    pub const KEY_ASSISTANT: u16 = 0x247;
+
+    pub const KEY_BRIGHTNESS_MIN: u16 = 0x250;
+    pub const KEY_BRIGHTNESS_MAX: u16 = 0x251;
+
+    pub const KEY_KBDINPUTASSIST_PREV: u16 = 0x260;
+    pub const KEY_KBDINPUTASSIST_NEXT: u16 = 0x261;
+    pub const KEY_KBDINPUTASSIST_PREVGROUP: u16 = 0x262;
+    pub const KEY_KBDINPUTASSIST_NEXTGROUP: u16 = 0x263;
+    pub const KEY_KBDINPUTASSIST_ACCEPT: u16 = 0x264;
+    pub const KEY_KBDINPUTASSIST_CANCEL: u16 = 0x265;
+
+    pub const KEY_RIGHT_UP: u16 = 0x266;
+    pub const KEY_RIGHT_DOWN: u16 = 0x267;
+    pub const KEY_LEFT_UP: u16 = 0x268;
+    pub const KEY_LEFT_DOWN: u16 = 0x269;
+
+    pub const KEY_ROOT_MENU: u16 = 0x26a;
+    pub const KEY_MEDIA_TOP_MENU: u16 = 0x26b;
+    pub const KEY_NUMERIC_11: u16 = 0x26c;
+    pub const KEY_NUMERIC_12: u16 = 0x26d;
+    pub const KEY_AUDIO_DESC: u16 = 0x26e;
+    pub const KEY_3D_MODE: u16 = 0x26f;
+    pub const KEY_NEXT_FAVORITE: u16 = 0x270;
+    pub const KEY_STOP_RECORD: u16 = 0x271;
+    pub const KEY_PAUSE_RECORD: u16 = 0x272;
+    pub const KEY_VOD: u16 = 0x273;
+    pub const KEY_UNMUTE: u16 = 0x274;
+    pub const KEY_FASTREVERSE: u16 = 0x275;
+    pub const KEY_SLOWREVERSE: u16 = 0x276;
+    pub const KEY_DATA: u16 = 0x277;
+    pub const KEY_ONSCREEN_KEYBOARD: u16 = 0x278;
+
+    pub const BTN_TRIGGER_HAPPY: u16 = 0x2c0;
+    pub const BTN_TRIGGER_HAPPY1: u16 = 0x2c0;
+    pub const BTN_TRIGGER_HAPPY2: u16 = 0x2c1;
+    pub const BTN_TRIGGER_HAPPY3: u16 = 0x2c2;
+    pub const BTN_TRIGGER_HAPPY4: u16 = 0x2c3;
+    pub const BTN_TRIGGER_HAPPY5: u16 = 0x2c4;
+    pub const BTN_TRIGGER_HAPPY6: u16 = 0x2c5;
+    pub const BTN_TRIGGER_HAPPY7: u16 = 0x2c6;
+    pub const BTN_TRIGGER_HAPPY8: u16 = 0x2c7;
+    pub const BTN_TRIGGER_HAPPY9: u16 = 0x2c8;
+    pub const BTN_TRIGGER_HAPPY10: u16 = 0x2c9;
+    pub const BTN_TRIGGER_HAPPY11: u16 = 0x2ca;
+    pub const BTN_TRIGGER_HAPPY12: u16 = 0x2cb;
+    pub const BTN_TRIGGER_HAPPY13: u16 = 0x2cc;
+    pub const BTN_TRIGGER_HAPPY14: u16 = 0x2cd;
+    pub const BTN_TRIGGER_HAPPY15: u16 = 0x2ce;
+    pub const BTN_TRIGGER_HAPPY16: u16 = 0x2cf;
+    pub const BTN_TRIGGER_HAPPY17: u16 = 0x2d0;
+    pub const BTN_TRIGGER_HAPPY18: u16 = 0x2d1;
+    pub const BTN_TRIGGER_HAPPY19: u16 = 0x2d2;
+    pub const BTN_TRIGGER_HAPPY20: u16 = 0x2d3;
+    pub const BTN_TRIGGER_HAPPY21: u16 = 0x2d4;
+    pub const BTN_TRIGGER_HAPPY22: u16 = 0x2d5;
+    pub const BTN_TRIGGER_HAPPY23: u16 = 0x2d6;
+    pub const BTN_TRIGGER_HAPPY24: u16 = 0x2d7;
+    pub const BTN_TRIGGER_HAPPY25: u16 = 0x2d8;
+    pub const BTN_TRIGGER_HAPPY26: u16 = 0x2d9;
+    pub const BTN_TRIGGER_HAPPY27: u16 = 0x2da;
+    pub const BTN_TRIGGER_HAPPY28: u16 = 0x2db;
+    pub const BTN_TRIGGER_HAPPY29: u16 = 0x2dc;
+    pub const BTN_TRIGGER_HAPPY30: u16 = 0x2dd;
+    pub const BTN_TRIGGER_HAPPY31: u16 = 0x2de;
+    pub const BTN_TRIGGER_HAPPY32: u16 = 0x2df;
+    pub const BTN_TRIGGER_HAPPY33: u16 = 0x2e0;
+    pub const BTN_TRIGGER_HAPPY34: u16 = 0x2e1;
+    pub const BTN_TRIGGER_HAPPY35: u16 = 0x2e2;
+    pub const BTN_TRIGGER_HAPPY36: u16 = 0x2e3;
+    pub const BTN_TRIGGER_HAPPY37: u16 = 0x2e4;
+    pub const BTN_TRIGGER_HAPPY38: u16 = 0x2e5;
+    pub const BTN_TRIGGER_HAPPY39: u16 = 0x2e6;
+    pub const BTN_TRIGGER_HAPPY40: u16 = 0x2e7;
+
+    pub const KEY_MIN_INTERESTING: u16 = KEY_MUTE;
+    pub const KEY_MAX: u16 = 0x2ff;
+    pub const KEY_CNT: u16 = (KEY_MAX + 1);
+}
+
+/// Relative axes
+pub mod rel {
+    pub const REL_X: u16 = 0x00;
+    pub const REL_Y: u16 = 0x01;
+    pub const REL_Z: u16 = 0x02;
+    pub const REL_RX: u16 = 0x03;
+    pub const REL_RY: u16 = 0x04;
+    pub const REL_RZ: u16 = 0x05;
+    pub const REL_HWHEEL: u16 = 0x06;
+    pub const REL_DIAL: u16 = 0x07;
+    pub const REL_WHEEL: u16 = 0x08;
+    pub const REL_MISC: u16 = 0x09;
+
+    pub const REL_RESERVED: u16 = 0x0a;
+    pub const REL_WHEEL_HI_RES: u16 = 0x0b;
+    pub const REL_HWHEEL_HI_RES: u16 = 0x0c;
+    pub const REL_MAX: u16 = 0x0f;
+    pub const REL_CNT: u16 = (REL_MAX + 1);
+}
+
+/// Absolute axes
+pub mod abs {
+    pub const ABS_X: u16 = 0x00;
+    pub const ABS_Y: u16 = 0x01;
+    pub const ABS_Z: u16 = 0x02;
+    pub const ABS_RX: u16 = 0x03;
+    pub const ABS_RY: u16 = 0x04;
+    pub const ABS_RZ: u16 = 0x05;
+    pub const ABS_THROTTLE: u16 = 0x06;
+    pub const ABS_RUDDER: u16 = 0x07;
+    pub const ABS_WHEEL: u16 = 0x08;
+    pub const ABS_GAS: u16 = 0x09;
+    pub const ABS_BRAKE: u16 = 0x0a;
+    pub const ABS_HAT0X: u16 = 0x10;
+    pub const ABS_HAT0Y: u16 = 0x11;
+    pub const ABS_HAT1X: u16 = 0x12;
+    pub const ABS_HAT1Y: u16 = 0x13;
+    pub const ABS_HAT2X: u16 = 0x14;
+    pub const ABS_HAT2Y: u16 = 0x15;
+    pub const ABS_HAT3X: u16 = 0x16;
+    pub const ABS_HAT3Y: u16 = 0x17;
+    pub const ABS_PRESSURE: u16 = 0x18;
+    pub const ABS_DISTANCE: u16 = 0x19;
+    pub const ABS_TILT_X: u16 = 0x1a;
+    pub const ABS_TILT_Y: u16 = 0x1b;
+    pub const ABS_TOOL_WIDTH: u16 = 0x1c;
+
+    pub const ABS_VOLUME: u16 = 0x20;
+
+    pub const ABS_MISC: u16 = 0x28;
+
+    pub const ABS_RESERVED: u16 = 0x2e;
+
+    pub const ABS_MT_SLOT: u16 = 0x2f;
+    pub const ABS_MT_TOUCH_MAJOR: u16 = 0x30;
+    pub const ABS_MT_TOUCH_MINOR: u16 = 0x31;
+    pub const ABS_MT_WIDTH_MAJOR: u16 = 0x32;
+    pub const ABS_MT_WIDTH_MINOR: u16 = 0x33;
+    pub const ABS_MT_ORIENTATION: u16 = 0x34;
+    pub const ABS_MT_POSITION_X: u16 = 0x35;
+    pub const ABS_MT_POSITION_Y: u16 = 0x36;
+    pub const ABS_MT_TOOL_TYPE: u16 = 0x37;
+    pub const ABS_MT_BLOB_ID: u16 = 0x38;
+    pub const ABS_MT_TRACKING_ID: u16 = 0x39;
+    pub const ABS_MT_PRESSURE: u16 = 0x3a;
+    pub const ABS_MT_DISTANCE: u16 = 0x3b;
+    pub const ABS_MT_TOOL_X: u16 = 0x3c;
+    pub const ABS_MT_TOOL_Y: u16 = 0x3d;
+
+    pub const ABS_MAX: u16 = 0x3f;
+    pub const ABS_CNT: u16 = (ABS_MAX + 1);
+}
+
+/// Switch events
+pub mod sw {
+    pub const SW_LID: u16 = 0x00;
+    pub const SW_TABLET_MODE: u16 = 0x01;
+    pub const SW_HEADPHONE_INSERT: u16 = 0x02;
+    pub const SW_RFKILL_ALL: u16 = 0x03;
+
+    pub const SW_RADIO: u16 = SW_RFKILL_ALL;
+    pub const SW_MICROPHONE_INSERT: u16 = 0x04;
+    pub const SW_DOCK: u16 = 0x05;
+    pub const SW_LINEOUT_INSERT: u16 = 0x06;
+    pub const SW_JACK_PHYSICAL_INSERT: u16 = 0x07;
+    pub const SW_VIDEOOUT_INSERT: u16 = 0x08;
+    pub const SW_CAMERA_LENS_COVER: u16 = 0x09;
+    pub const SW_KEYPAD_SLIDE: u16 = 0x0a;
+    pub const SW_FRONT_PROXIMITY: u16 = 0x0b;
+    pub const SW_ROTATE_LOCK: u16 = 0x0c;
+    pub const SW_LINEIN_INSERT: u16 = 0x0d;
+    pub const SW_MUTE_DEVICE: u16 = 0x0e;
+    pub const SW_PEN_INSERTED: u16 = 0x0f;
+    pub const SW_MAX: u16 = 0x0f;
+    pub const SW_CNT: u16 = (SW_MAX + 1);
+}
+
+/// Misc events
+pub mod msc {
+    pub const MSC_SERIAL: u16 = 0x00;
+    pub const MSC_PULSELED: u16 = 0x01;
+    pub const MSC_GESTURE: u16 = 0x02;
+    pub const MSC_RAW: u16 = 0x03;
+    pub const MSC_SCAN: u16 = 0x04;
+    pub const MSC_TIMESTAMP: u16 = 0x05;
+    pub const MSC_MAX: u16 = 0x07;
+    pub const MSC_CNT: u16 = (MSC_MAX + 1);
+}
+
+/// LEDs
+pub mod led {
+    pub const LED_NUML: u16 = 0x00;
+    pub const LED_CAPSL: u16 = 0x01;
+    pub const LED_SCROLLL: u16 = 0x02;
+    pub const LED_COMPOSE: u16 = 0x03;
+    pub const LED_KANA: u16 = 0x04;
+    pub const LED_SLEEP: u16 = 0x05;
+    pub const LED_SUSPEND: u16 = 0x06;
+    pub const LED_MUTE: u16 = 0x07;
+    pub const LED_MISC: u16 = 0x08;
+    pub const LED_MAIL: u16 = 0x09;
+    pub const LED_CHARGING: u16 = 0x0a;
+    pub const LED_MAX: u16 = 0x0f;
+    pub const LED_CNT: u16 = (LED_MAX + 1);
+}
+
+/// Autorepeat values
+pub mod rep {
+    pub const REP_DELAY: u16 = 0x00;
+    pub const REP_PERIOD: u16 = 0x01;
+    pub const REP_MAX: u16 = 0x01;
+    pub const REP_CNT: u16 = (REP_MAX + 1);
+}
+
+/// Sounds
+pub mod snd {
+    pub const SND_CLICK: u16 = 0x00;
+    pub const SND_BELL: u16 = 0x01;
+    pub const SND_TONE: u16 = 0x02;
+    pub const SND_MAX: u16 = 0x07;
+    pub const SND_CNT: u16 = (SND_MAX + 1);
+}
--- a/drivers/src/input/mod.rs
+++ b/drivers/src/input/mod.rs
@ -0,0 +1,7 @@
+//! Only Mouse currently.
+
+mod mouse;
+
+pub mod input_event_codes;
+
+pub use mouse::{Mouse, MouseFlags, MouseState};
--- a/drivers/src/input/mouse.rs
+++ b/drivers/src/input/mouse.rs
@ -0,0 +1,133 @@
+use alloc::{boxed::Box, sync::Arc};
+
+use lock::Mutex;
+
+use crate::prelude::{CapabilityType, InputEvent, InputEventType};
+use crate::scheme::{impl_event_scheme, InputScheme};
+use crate::utils::EventListener;
+
+bitflags::bitflags! {
+    #[derive(Default)]
+    pub struct MouseFlags: u8 {
+        /// Whether or not the left mouse button is pressed.
+        const LEFT_BTN = 1 << 0;
+        /// Whether or not the right mouse button is pressed.
+        const RIGHT_BTN = 1 << 1;
+        /// Whether or not the middle mouse button is pressed.
+        const MIDDLE_BTN = 1 << 2;
+        /// Whether or not the packet is valid or not.
+        const ALWAYS_ONE = 1 << 3;
+        /// Whether or not the x delta is negative.
+        const X_SIGN = 1 << 4;
+        /// Whether or not the y delta is negative.
+        const Y_SIGN = 1 << 5;
+    }
+}
+
+#[derive(Default, Debug, Clone, Copy)]
+pub struct MouseState {
+    pub dx: i32,
+    pub dy: i32,
+    pub dz: i32,
+    pub buttons: MouseFlags,
+}
+
+impl MouseState {
+    pub fn as_ps2_buf(&self) -> [u8; 3] {
+        let mut flags = self.buttons | MouseFlags::ALWAYS_ONE;
+        let dx = self.dx.max(-127).min(127);
+        let dy = self.dy.max(-127).min(127);
+        if dx < 0 {
+            flags |= MouseFlags::X_SIGN;
+        }
+        if dy < 0 {
+            flags |= MouseFlags::Y_SIGN;
+        }
+        [flags.bits(), dx as u8, dy as u8]
+    }
+}
+
+impl MouseState {
+    fn update(&mut self, e: &InputEvent) -> Option<MouseState> {
+        match e.event_type {
+            InputEventType::Syn => {
+                use super::input_event_codes::syn::*;
+                if e.code == SYN_REPORT {
+                    let saved = *self;
+                    self.dx = 0;
+                    self.dy = 0;
+                    self.dz = 0;
+                    return Some(saved);
+                }
+            }
+            InputEventType::Key => {
+                use super::input_event_codes::key::*;
+                let btn = match e.code {
+                    BTN_LEFT => MouseFlags::LEFT_BTN,
+                    BTN_RIGHT => MouseFlags::RIGHT_BTN,
+                    BTN_MIDDLE => MouseFlags::MIDDLE_BTN,
+                    _ => return None,
+                };
+                if e.value == 0 {
+                    self.buttons -= btn;
+                } else {
+                    self.buttons |= btn;
+                }
+            }
+            InputEventType::RelAxis => {
+                use super::input_event_codes::rel::*;
+                match e.code {
+                    REL_X => self.dx += e.value,
+                    REL_Y => self.dy -= e.value,
+                    REL_WHEEL => self.dz -= e.value,
+                    _ => {}
+                }
+            }
+            _ => {}
+        }
+        None
+    }
+}
+
+pub struct Mouse {
+    listener: EventListener<MouseState>,
+    state: Mutex<MouseState>,
+}
+
+impl_event_scheme!(Mouse, MouseState);
+
+impl Mouse {
+    pub fn new(input: Arc<dyn InputScheme>) -> Arc<Self> {
+        let ret = Arc::new(Self {
+            listener: EventListener::new(),
+            state: Mutex::new(MouseState::default()),
+        });
+        let cloned = ret.clone();
+        input.subscribe(Box::new(move |e| cloned.handle_input_event(e)), false);
+        ret
+    }
+
+    fn handle_input_event(&self, e: &InputEvent) {
+        if let Some(p) = self.state.lock().update(e) {
+            self.listener.trigger(p);
+        }
+    }
+
+    pub fn compatible_with(input: &Arc<dyn InputScheme>) -> bool {
+        // A mouse like device, at least one button, two relative axes.
+        use super::input_event_codes::{ev::*, key::*, rel::*};
+        let ev = input.capability(CapabilityType::Event);
+        let key = input.capability(CapabilityType::Key);
+        let rel = input.capability(CapabilityType::RelAxis);
+        if !ev.contains_all(&[EV_KEY, EV_REL]) {
+            return false;
+        }
+        if !key.contains(BTN_LEFT) {
+            return false;
+        }
+        if !rel.contains_all(&[REL_X, REL_Y]) {
+            return false;
+        }
+        true
+    }
+}
--- a/drivers/src/io/mmio.rs
+++ b/drivers/src/io/mmio.rs
@ -0,0 +1,53 @@
+use super::Io;
+use core::ops::{BitAnd, BitOr, Not};
+
+// 主存映射 I/O。
+/// Memory-mapped I/O.
+#[repr(transparent)]
+pub struct Mmio<T>(T);
+
+impl<T> Mmio<T> {
+    /// # Safety
+    ///
+    /// This function is unsafe because `base_addr` may be an arbitrary address.
+    pub unsafe fn from_base_as<'a, R>(base_addr: usize) -> &'a mut R {
+        assert_eq!(base_addr % core::mem::size_of::<T>(), 0);
+        &mut *(base_addr as *mut R)
+    }
+
+    /// # Safety
+    ///
+    /// This function is unsafe because `base_addr` may be an arbitrary address.
+    pub unsafe fn from_base<'a>(base_addr: usize) -> &'a mut Self {
+        Self::from_base_as(base_addr)
+    }
+
+    pub fn add<'a>(&self, offset: usize) -> &'a mut Self {
+        unsafe { Self::from_base((&self.0 as *const T).add(offset) as _) }
+    }
+}
+
+impl<T> Io for Mmio<T>
+where
+    T: Copy + BitAnd<Output = T> + BitOr<Output = T> + Not<Output = T>,
+{
+    type Value = T;
+
+    fn read(&self) -> T {
+        #[allow(clippy::let_and_return)]
+        unsafe {
+            let val = core::ptr::read_volatile(&self.0 as *const _);
+            #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+            core::arch::asm!("fence i,r");
+            val
+        }
+    }
+
+    fn write(&mut self, value: T) {
+        unsafe {
+            #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
+            core::arch::asm!("fence w,o");
+            core::ptr::write_volatile(&mut self.0 as *mut _, value)
+        };
+    }
+}
--- a/drivers/src/io/mod.rs
+++ b/drivers/src/io/mod.rs
@ -0,0 +1,79 @@
+// 封装对外设地址空间的访问，包括内存映射 IO 和端口映射 IO。
+//
+// 要了解这两种访问外设的方式，查看[维基百科](https://en.wikipedia.org/wiki/Memory-mapped_I/O)。
+//! Peripheral address space access, including memory-mapped IO and port-mapped IO.
+//!
+//! About these two methods of performing I/O, see [wikipedia](https://en.wikipedia.org/wiki/Memory-mapped_I/O).
+
+use core::ops::{BitAnd, BitOr, Not};
+
+mod mmio;
+#[cfg(target_arch = "x86_64")]
+mod pmio;
+
+pub use mmio::Mmio;
+#[cfg(target_arch = "x86_64")]
+pub use pmio::Pmio;
+
+// 用于处理外设地址空间访问的接口。
+/// An interface for dealing with device address space access.
+pub trait Io {
+    // 可访问的对象的类型。
+    /// The type of object to access.
+    type Value: Copy
+        + BitAnd<Output = Self::Value>
+        + BitOr<Output = Self::Value>
+        + Not<Output = Self::Value>;
+
+    // 从外设读取值。
+    /// Reads value from device.
+    fn read(&self) -> Self::Value;
+
+    // 向外设写入值。
+    /// Writes `value` to device.
+    fn write(&mut self, value: Self::Value);
+}
+
+// 外设地址空间的一个只读单元。
+/// A readonly unit in device address space.
+#[repr(transparent)]
+pub struct ReadOnly<I>(I);
+
+impl<I> ReadOnly<I> {
+    // 构造外设地址空间的一个只读单元。
+    /// Constructs a readonly unit in device address space.
+    pub const fn new(inner: I) -> Self {
+        Self(inner)
+    }
+}
+
+impl<I: Io> ReadOnly<I> {
+    // 从外设读取值。
+    /// Reads value from device.
+    #[inline(always)]
+    pub fn read(&self) -> I::Value {
+        self.0.read()
+    }
+}
+
+// 外设地址空间的一个只写单元。
+/// A write-only unit in device address space.
+#[repr(transparent)]
+pub struct WriteOnly<I>(I);
+
+impl<I> WriteOnly<I> {
+    // 构造外设地址空间的一个只写单元。
+    /// Constructs a write-only unit in device address space.
+    pub const fn new(inner: I) -> Self {
+        Self(inner)
+    }
+}
+
+impl<I: Io> WriteOnly<I> {
+    // 向外设写入值。
+    /// Writes `value` to device.
+    #[inline(always)]
+    pub fn write(&mut self, value: I::Value) {
+        self.0.write(value);
+    }
+}
--- a/drivers/src/io/pmio.rs
+++ b/drivers/src/io/pmio.rs
@ -0,0 +1,102 @@
+// 端口映射 I/O。
+//! Port-mapped I/O.
+
+use super::Io;
+use core::{arch::asm, marker::PhantomData};
+
+// 端口映射 I/O。
+/// Port-mapped I/O.
+#[derive(Copy, Clone)]
+pub struct Pmio<T> {
+    port: u16,
+    _phantom: PhantomData<T>,
+}
+
+impl<T> Pmio<T> {
+    // 映射指定端口进行外设访问。
+    /// Maps a given port to assess device.
+    pub const fn new(port: u16) -> Self {
+        Self {
+            port,
+            _phantom: PhantomData,
+        }
+    }
+}
+
+// 逐字节端口映射读写。
+/// Read/Write for byte PMIO.
+impl Io for Pmio<u8> {
+    type Value = u8;
+
+    // 读。
+    /// Read.
+    #[inline(always)]
+    fn read(&self) -> u8 {
+        let value: u8;
+        unsafe {
+            asm!("in al, dx", out("al") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+        value
+    }
+
+    // 写。
+    /// Write.
+    #[inline(always)]
+    fn write(&mut self, value: u8) {
+        unsafe {
+            asm!("out dx, al", in("al") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+    }
+}
+
+// 逐字端口映射读写。
+/// Read/Write for word PMIO.
+impl Io for Pmio<u16> {
+    type Value = u16;
+
+    // 读。
+    /// Read.
+    #[inline(always)]
+    fn read(&self) -> u16 {
+        let value: u16;
+        unsafe {
+            asm!("in ax, dx", out("ax") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+        value
+    }
+
+    // 写。
+    /// Write.
+    #[inline(always)]
+    fn write(&mut self, value: u16) {
+        unsafe {
+            asm!("out dx, ax", in("ax") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+    }
+}
+
+// 逐双字端口映射读写。
+/// Read/Write for double-word PMIO.
+impl Io for Pmio<u32> {
+    type Value = u32;
+
+    // 读。
+    /// Read.
+    #[inline(always)]
+    fn read(&self) -> u32 {
+        let value: u32;
+        unsafe {
+            asm!("in eax, dx", out("eax") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+        value
+    }
+
+    // 写。
+    /// Write.
+    #[inline(always)]
+    fn write(&mut self, value: u32) {
+        unsafe {
+            asm!("out dx, eax", in("eax") value, in("dx") self.port, options(nomem, nostack, preserves_flags));
+        }
+    }
+}
--- a/drivers/src/irq/mod.rs
+++ b/drivers/src/irq/mod.rs
@ -0,0 +1,22 @@
+//! External interrupt request and handle.
+
+cfg_if::cfg_if! {
+    if #[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))] {
+        mod riscv_intc;
+        mod riscv_plic;
+
+        /// Implementation of risc-v interrupt controller.
+        #[doc(cfg(any(target_arch = "riscv32", target_arch = "riscv64")))]
+        pub mod riscv {
+            pub use super::riscv_intc::{Intc, ScauseIntCode};
+            pub use super::riscv_plic::Plic;
+        }
+    } else if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
+        mod x86_apic;
+        /// Implementation of x86 Advanced Programmable Interrupt Controller.
+        #[doc(cfg(any(target_arch = "x86", target_arch = "x86_64")))]
+        pub mod x86 {
+            pub use super::x86_apic::Apic;
+        }
+    }
+}
--- a/drivers/src/irq/riscv_intc.rs
+++ b/drivers/src/irq/riscv_intc.rs
@ -0,0 +1,131 @@
+use lock::Mutex;
+use riscv::register::sie;
+
+use crate::prelude::IrqHandler;
+use crate::scheme::{IrqScheme, Scheme};
+use crate::{DeviceError, DeviceResult};
+use alloc::format;
+use alloc::string::String;
+use core::sync::atomic::{AtomicU8, Ordering};
+
+const S_SOFT: usize = 1;
+const S_TIMER: usize = 5;
+const S_EXT: usize = 9;
+
+static INTC_NUM: AtomicU8 = AtomicU8::new(0);
+
+#[repr(usize)]
+pub enum ScauseIntCode {
+    SupervisorSoft = S_SOFT,
+    SupervisorTimer = S_TIMER,
+    SupervisorExternal = S_EXT,
+}
+
+pub struct Intc {
+    name: String,
+    soft_handler: Mutex<Option<IrqHandler>>,
+    timer_handler: Mutex<Option<IrqHandler>>,
+    ext_handler: Mutex<Option<IrqHandler>>,
+}
+
+impl Intc {
+    pub fn new() -> Self {
+        Self {
+            name: format!("riscv-intc-cpu{}", INTC_NUM.fetch_add(1, Ordering::Relaxed)),
+            soft_handler: Mutex::new(None),
+            timer_handler: Mutex::new(None),
+            ext_handler: Mutex::new(None),
+        }
+    }
+
+    fn with_handler<F>(&self, cause: usize, op: F) -> DeviceResult
+    where
+        F: FnOnce(&mut Option<IrqHandler>) -> DeviceResult,
+    {
+        match cause {
+            S_SOFT => op(&mut self.soft_handler.lock()),
+            S_TIMER => op(&mut self.timer_handler.lock()),
+            S_EXT => op(&mut self.ext_handler.lock()),
+            _ => {
+                error!("invalid SCAUSE value {:#x}!", cause);
+                Err(DeviceError::InvalidParam)
+            }
+        }
+    }
+}
+
+impl Default for Intc {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Scheme for Intc {
+    fn name(&self) -> &str {
+        self.name.as_str()
+    }
+
+    fn handle_irq(&self, cause: usize) {
+        self.with_handler(cause, |opt| {
+            if let Some(h) = opt {
+                h();
+            } else {
+                warn!("no registered handler for SCAUSE {}!", cause);
+            }
+            Ok(())
+        })
+        .unwrap();
+    }
+}
+
+impl IrqScheme for Intc {
+    fn is_valid_irq(&self, cause: usize) -> bool {
+        matches!(cause, S_SOFT | S_TIMER | S_EXT)
+    }
+
+    fn mask(&self, cause: usize) -> DeviceResult {
+        unsafe {
+            match cause {
+                S_SOFT => sie::clear_ssoft(),
+                S_TIMER => sie::clear_stimer(),
+                S_EXT => sie::clear_sext(),
+                _ => return Err(DeviceError::InvalidParam),
+            }
+        }
+        Ok(())
+    }
+
+    fn unmask(&self, cause: usize) -> DeviceResult {
+        unsafe {
+            match cause {
+                S_SOFT => sie::set_ssoft(),
+                S_TIMER => sie::set_stimer(),
+                S_EXT => sie::set_sext(),
+                _ => return Err(DeviceError::InvalidParam),
+            }
+        }
+        Ok(())
+    }
+
+    fn register_handler(&self, cause: usize, handler: IrqHandler) -> DeviceResult {
+        self.with_handler(cause, |opt| {
+            if opt.is_some() {
+                Err(DeviceError::AlreadyExists)
+            } else {
+                *opt = Some(handler);
+                Ok(())
+            }
+        })
+    }
+
+    fn unregister(&self, cause: usize) -> DeviceResult {
+        self.with_handler(cause, |opt| {
+            if opt.is_some() {
+                *opt = None;
+                Ok(())
+            } else {
+                Err(DeviceError::InvalidParam)
+            }
+        })
+    }
+}
--- a/drivers/src/irq/riscv_plic.rs
+++ b/drivers/src/irq/riscv_plic.rs
@ -0,0 +1,171 @@
+use core::arch::asm;
+use core::ops::Range;
+
+use lock::Mutex;
+
+use crate::io::{Io, Mmio};
+use crate::prelude::IrqHandler;
+use crate::scheme::{IrqScheme, Scheme};
+use crate::{utils::IrqManager, DeviceError, DeviceResult};
+
+const IRQ_RANGE: Range<usize> = 1..1024;
+
+const PLIC_PRIORITY_BASE: usize = 0x0;
+const PLIC_ENABLE_BASE: usize = 0x2080;
+
+const PLIC_CONTEXT_BASE: usize = 0x20_1000;
+const PLIC_CONTEXT_THRESHOLD: usize = 0x0;
+const PLIC_CONTEXT_CLAIM: usize = 0x4 / core::mem::size_of::<u32>();
+
+const PLIC_ENABLE_HART_OFFSET: usize = 0x100 / core::mem::size_of::<u32>();
+const PLIC_PRIORITY_HART_OFFSET: usize = 0x2000 / core::mem::size_of::<u32>();
+const PLIC_CONTEXT_CLAIM_HART_OFFSET: usize = 0x2000 / core::mem::size_of::<u32>();
+
+struct PlicUnlocked {
+    priority_base: &'static mut Mmio<u32>,
+    enable_base: &'static mut Mmio<u32>,
+    context_base: &'static mut Mmio<u32>,
+    manager: IrqManager<1024>,
+}
+
+pub struct Plic {
+    inner: Mutex<PlicUnlocked>,
+}
+
+impl PlicUnlocked {
+    /// Toggle irq enable on the current hart.
+    fn toggle(&mut self, irq_num: usize, enable: bool) {
+        debug_assert!(IRQ_RANGE.contains(&irq_num));
+        let hart_id = cpu_id() as usize;
+        let mmio = self
+            .enable_base
+            .add(PLIC_ENABLE_HART_OFFSET * hart_id + irq_num / 32);
+
+        let mask = 1 << (irq_num % 32);
+        if enable {
+            mmio.write(mmio.read() | mask);
+        } else {
+            mmio.write(mmio.read() & !mask);
+        }
+    }
+
+    /// Ask the PLIC what type of interrupt is occurred on the current hart.
+    fn pending_irq(&mut self) -> Option<usize> {
+        let hart_id = cpu_id() as usize;
+        let irq_num = self
+            .context_base
+            .add(PLIC_CONTEXT_CLAIM_HART_OFFSET * hart_id + PLIC_CONTEXT_CLAIM)
+            .read() as usize;
+        if irq_num == 0 {
+            None
+        } else {
+            Some(irq_num)
+        }
+    }
+
+    /// Tell the PLIC we've served this IRQ.
+    fn eoi(&mut self, irq_num: usize) {
+        debug_assert!(IRQ_RANGE.contains(&irq_num));
+        let hart_id = cpu_id() as usize;
+        self.context_base
+            .add(PLIC_CONTEXT_CLAIM + PLIC_CONTEXT_CLAIM_HART_OFFSET * hart_id)
+            .write(irq_num as _);
+    }
+
+    /// Set the priority for the irq_num.
+    fn set_priority(&mut self, irq_num: usize, priority: u8) {
+        debug_assert!(IRQ_RANGE.contains(&irq_num));
+        self.priority_base.add(irq_num).write(priority as _);
+    }
+
+    /// Set current hart's priority threshold to 0.
+    fn set_threshold(&mut self, threshold: u8) {
+        let hart_id = cpu_id() as usize;
+        self.context_base
+            .add(PLIC_PRIORITY_HART_OFFSET * hart_id + PLIC_CONTEXT_THRESHOLD)
+            .write(threshold as _);
+    }
+
+    fn init_hart(&mut self) {
+        self.set_threshold(0);
+    }
+}
+
+impl Plic {
+    pub fn new(base: usize) -> Self {
+        let mut inner = PlicUnlocked {
+            priority_base: unsafe { Mmio::<u32>::from_base(base + PLIC_PRIORITY_BASE) },
+            enable_base: unsafe { Mmio::<u32>::from_base(base + PLIC_ENABLE_BASE) },
+            context_base: unsafe { Mmio::<u32>::from_base(base + PLIC_CONTEXT_BASE) },
+            manager: IrqManager::new(IRQ_RANGE),
+        };
+        inner.init_hart();
+        Self {
+            inner: Mutex::new(inner),
+        }
+    }
+}
+
+impl Scheme for Plic {
+    fn name(&self) -> &str {
+        "riscv-plic"
+    }
+
+    fn handle_irq(&self, _unused: usize) {
+        let mut inner = self.inner.lock();
+        while let Some(irq_num) = inner.pending_irq() {
+            if inner.manager.handle(irq_num).is_err() {
+                warn!("no registered handler for IRQ {}!", irq_num);
+            }
+            trace!("riscv plic handle irq: {}", irq_num);
+            inner.eoi(irq_num);
+        }
+    }
+}
+
+impl IrqScheme for Plic {
+    fn is_valid_irq(&self, irq_num: usize) -> bool {
+        IRQ_RANGE.contains(&irq_num)
+    }
+
+    fn mask(&self, irq_num: usize) -> DeviceResult {
+        if self.is_valid_irq(irq_num) {
+            self.inner.lock().toggle(irq_num, false);
+            Ok(())
+        } else {
+            Err(DeviceError::InvalidParam)
+        }
+    }
+
+    fn unmask(&self, irq_num: usize) -> DeviceResult {
+        if self.is_valid_irq(irq_num) {
+            self.inner.lock().toggle(irq_num, true);
+            Ok(())
+        } else {
+            Err(DeviceError::InvalidParam)
+        }
+    }
+
+    fn register_handler(&self, irq_num: usize, handler: IrqHandler) -> DeviceResult {
+        let mut inner = self.inner.lock();
+        inner.manager.register_handler(irq_num, handler).map(|_| {
+            inner.set_priority(irq_num, 7);
+        })
+    }
+
+    fn unregister(&self, irq_num: usize) -> DeviceResult {
+        self.inner.lock().manager.unregister_handler(irq_num)
+    }
+
+    fn init_hart(&self) {
+        self.inner.lock().init_hart();
+    }
+}
+
+fn cpu_id() -> u8 {
+    let mut cpu_id;
+    unsafe {
+        asm!("mv {0}, tp", out(reg) cpu_id);
+    }
+    cpu_id
+}
--- a/drivers/src/irq/x86_apic/consts.rs
+++ b/drivers/src/irq/x86_apic/consts.rs
@ -0,0 +1,8 @@
+// TODO: configurable
+
+pub const X86_INT_BASE: usize = 0x20;
+
+pub const X86_INT_LOCAL_APIC_BASE: usize = 0xf0;
+pub const X86_INT_APIC_SPURIOUS: usize = X86_INT_LOCAL_APIC_BASE;
+pub const X86_INT_APIC_TIMER: usize = X86_INT_LOCAL_APIC_BASE + 0x1;
+pub const X86_INT_APIC_ERROR: usize = X86_INT_LOCAL_APIC_BASE + 0x2;
--- a/drivers/src/irq/x86_apic/ioapic.rs
+++ b/drivers/src/irq/x86_apic/ioapic.rs
@ -0,0 +1,204 @@
+use alloc::vec::Vec;
+use core::{fmt, ptr::NonNull};
+
+use acpi::platform::interrupt::InterruptModel;
+use acpi::{AcpiHandler, AcpiTables, PhysicalMapping};
+use lock::Mutex;
+use x2apic::ioapic::{IoApic as IoApicInner, IrqFlags, IrqMode};
+
+use super::{IrqPolarity, IrqTriggerMode, Phys2VirtFn};
+
+const PAGE_SIZE: usize = 4096;
+
+#[derive(Clone)]
+struct AcpiMapHandler {
+    phys_to_virt: Phys2VirtFn,
+}
+
+impl AcpiHandler for AcpiMapHandler {
+    /// we just impl this function, `rdsp` crate will use it, and we not.
+    unsafe fn map_physical_region<T>(
+        &self,
+        physical_address: usize,
+        size: usize,
+    ) -> PhysicalMapping<Self, T> {
+        // address maybe not aligned, so we align it mannualy
+        let aligned_start = physical_address & !(PAGE_SIZE - 1);
+        let aligned_end = (physical_address + size + PAGE_SIZE - 1) & !(PAGE_SIZE - 1);
+        PhysicalMapping::new(
+            physical_address,
+            NonNull::new_unchecked((self.phys_to_virt)(physical_address) as *mut T),
+            size,
+            aligned_end - aligned_start,
+            self.clone(),
+        )
+    }
+
+    /// we do nothing here
+    fn unmap_physical_region<T>(_region: &PhysicalMapping<Self, T>) {}
+}
+
+/// An I/O APIC structure.
+///
+/// For local APIC and I/O APIC, we can learn something from here: <https://wiki.osdev.org/APIC>.
+pub struct IoApic {
+    /// I/O APIC id.
+    id: u8,
+    /// GSI means Global System Interrupt, `gsi_start` is the base number of GSI
+    /// in this I/O APIC.
+    gsi_start: u32,
+    /// Max entry num of the interrupt redirection table.
+    max_entry: u8,
+    /// Use `x2apic` crate to help us manipulate IOAPIC.
+    inner: Mutex<IoApicInner>,
+}
+
+/// A list of I/O-APICs for systems have multiple I/O subsystems.
+#[derive(Debug)]
+pub struct IoApicList {
+    io_apics: Vec<IoApic>,
+}
+
+impl IoApic {
+    /// Create a new [`IoApic`] from fields parsed from the ACPI table, and
+    /// initialize it by disabling all interrupts.
+    pub fn new(id: u8, base_vaddr: usize, gsi_start: u32) -> Self {
+        let mut inner = unsafe { IoApicInner::new(base_vaddr as u64) };
+        let max_entry = unsafe { inner.max_table_entry() };
+        unsafe { assert_eq!(id, inner.id()) };
+
+        unsafe {
+            inner.init(super::X86_INT_BASE as u8);
+        }
+        for i in 0..max_entry + 1 {
+            unsafe {
+                // disable all interrupts
+                inner.disable_irq(i);
+
+                // Clean the redirection table
+                let mut entry = inner.table_entry(i);
+                entry.set_vector(0);
+                entry.set_dest(0);
+                entry.set_mode(IrqMode::Fixed);
+                entry.set_flags(IrqFlags::MASKED);
+                inner.set_table_entry(i, entry);
+            }
+        }
+        Self {
+            id,
+            gsi_start,
+            max_entry,
+            inner: Mutex::new(inner),
+        }
+    }
+
+    /// Set apic entry IRQ state by `gsi`.
+    pub fn toggle(&self, gsi: u32, enabled: bool) {
+        let idx = (gsi - self.gsi_start) as u8;
+        unsafe {
+            if enabled {
+                self.inner.lock().enable_irq(idx);
+            } else {
+                self.inner.lock().disable_irq(idx);
+            }
+        }
+    }
+
+    /// Get the IDT vector of the `gsi` from redirection table.
+    pub fn get_vector(&self, gsi: u32) -> u8 {
+        let idx = (gsi - self.gsi_start) as u8;
+        unsafe { self.inner.lock().table_entry(idx).vector() }
+    }
+
+    /// Set the IDT vector of the `gsi` in redirection table.
+    pub fn map_vector(&self, gsi: u32, vector: u8) {
+        let idx = (gsi - self.gsi_start) as u8;
+        let mut inner = self.inner.lock();
+        unsafe {
+            let mut entry = inner.table_entry(idx);
+            entry.set_vector(vector);
+            inner.set_table_entry(idx, entry);
+        }
+    }
+
+    /// Set the interrupt triggle mode, polarity and other fields of the `gsi`
+    /// in redirection table.
+    pub fn configure(&self, gsi: u32, tm: IrqTriggerMode, pol: IrqPolarity, dest: u8, vector: u8) {
+        let idx = (gsi - self.gsi_start) as u8;
+        let mut inner = self.inner.lock();
+        let mut entry = unsafe { inner.table_entry(idx) };
+        entry.set_vector(vector);
+        entry.set_mode(IrqMode::Fixed);
+        entry.set_dest(dest);
+
+        let mut flags = IrqFlags::MASKED; // destination mode: physical
+        if matches!(tm, IrqTriggerMode::Edge) {
+            flags |= IrqFlags::LEVEL_TRIGGERED;
+        }
+        if matches!(pol, IrqPolarity::ActiveLow) {
+            flags |= IrqFlags::LOW_ACTIVE;
+        }
+        entry.set_flags(flags);
+
+        unsafe { inner.set_table_entry(idx, entry) };
+    }
+}
+
+impl IoApicList {
+    /// Probe all I/O APICs from the ACPI table represented by `acpi_rsdp`.
+    pub fn new(acpi_rsdp: usize, phys_to_virt: Phys2VirtFn) -> Self {
+        let handler = AcpiMapHandler { phys_to_virt };
+        // parse ACPI table by the physical address of the RSDP.
+        let tables = unsafe { AcpiTables::from_rsdp(handler, acpi_rsdp).unwrap() };
+        let io_apics =
+            if let InterruptModel::Apic(apic) = tables.platform_info().unwrap().interrupt_model {
+                apic.io_apics
+                    .iter()
+                    .map(|i| {
+                        IoApic::new(
+                            i.id,
+                            phys_to_virt(i.address as usize),
+                            i.global_system_interrupt_base,
+                        )
+                    })
+                    .collect()
+            } else {
+                // only legacy i8259 PIC is present
+                Vec::new()
+            };
+        Self { io_apics }
+    }
+
+    /// Get the corresponding I/O APIC of the `gsi`, each I/O-APIC have a range
+    /// of GSI number.
+    pub fn find(&self, gsi: u32) -> Option<&IoApic> {
+        self.io_apics
+            .iter()
+            .find(|i| i.gsi_start <= gsi && gsi <= i.gsi_start + i.max_entry as u32)
+    }
+}
+
+impl fmt::Debug for IoApic {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        struct RedirTable<'a>(&'a IoApic);
+
+        impl<'a> fmt::Debug for RedirTable<'a> {
+            fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+                let mut inner = self.0.inner.lock();
+                let count = self.0.max_entry + 1;
+                f.debug_list()
+                    .entries((0..count).map(|i| unsafe { inner.table_entry(i) }))
+                    .finish()
+            }
+        }
+
+        let version = unsafe { self.inner.lock().version() };
+        f.debug_struct("IoApic")
+            .field("id", &self.id)
+            .field("version", &version)
+            .field("gsi_start", &self.gsi_start)
+            .field("max_entry", &self.max_entry)
+            .field("redir_table", &RedirTable(self))
+            .finish()
+    }
+}
--- a/drivers/src/irq/x86_apic/lapic.rs
+++ b/drivers/src/irq/x86_apic/lapic.rs
@ -0,0 +1,72 @@
+use x2apic::lapic::{
+    xapic_base, LocalApic as LocalApicInner, LocalApicBuilder, TimerDivide, TimerMode,
+};
+
+use super::{consts, Phys2VirtFn};
+
+static mut LOCAL_APIC: Option<LocalApic> = None;
+static mut BSP_ID: Option<u8> = None;
+
+pub struct LocalApic {
+    inner: LocalApicInner,
+}
+
+impl LocalApic {
+    pub unsafe fn get<'a>() -> &'a mut LocalApic {
+        LOCAL_APIC
+            .as_mut()
+            .expect("Local APIC is not initialized by BSP")
+    }
+
+    pub unsafe fn init_bsp(phys_to_virt: Phys2VirtFn) {
+        let base_vaddr = phys_to_virt(xapic_base() as usize);
+        let mut inner = LocalApicBuilder::new()
+            .timer_vector(consts::X86_INT_APIC_TIMER)
+            .error_vector(consts::X86_INT_APIC_ERROR)
+            .spurious_vector(consts::X86_INT_APIC_SPURIOUS)
+            .set_xapic_base(base_vaddr as u64)
+            .build()
+            .unwrap_or_else(|err| panic!("{}", err));
+        inner.enable();
+
+        assert!(inner.is_bsp());
+        BSP_ID = Some((inner.id() >> 24) as u8);
+        LOCAL_APIC = Some(LocalApic { inner });
+    }
+
+    pub unsafe fn init_ap() {
+        Self::get().inner.enable();
+    }
+
+    pub fn bsp_id() -> u8 {
+        unsafe { BSP_ID.unwrap() }
+    }
+
+    pub fn id(&mut self) -> u8 {
+        unsafe { (self.inner.id() >> 24) as u8 }
+    }
+
+    pub fn eoi(&mut self) {
+        unsafe { self.inner.end_of_interrupt() }
+    }
+
+    pub fn disable_timer(&mut self) {
+        unsafe { self.inner.disable_timer() }
+    }
+
+    pub fn enable_timer(&mut self) {
+        unsafe { self.inner.enable_timer() }
+    }
+
+    pub fn set_timer_mode(&mut self, mode: TimerMode) {
+        unsafe { self.inner.set_timer_mode(mode) }
+    }
+
+    pub fn set_timer_divide(&mut self, divide: TimerDivide) {
+        unsafe { self.inner.set_timer_divide(divide) }
+    }
+
+    pub fn set_timer_initial(&mut self, initial: u32) {
+        unsafe { self.inner.set_timer_initial(initial) }
+    }
+}
--- a/drivers/src/irq/x86_apic/mod.rs
+++ b/drivers/src/irq/x86_apic/mod.rs
@ -0,0 +1,176 @@
+mod consts;
+mod ioapic;
+mod lapic;
+
+use self::consts::{X86_INT_BASE, X86_INT_LOCAL_APIC_BASE};
+use self::ioapic::{IoApic, IoApicList};
+use self::lapic::LocalApic;
+use crate::prelude::{IrqHandler, IrqPolarity, IrqTriggerMode};
+use crate::scheme::{IrqScheme, Scheme};
+use crate::{utils::IrqManager, DeviceError, DeviceResult, PhysAddr, VirtAddr};
+use core::ops::Range;
+use lock::Mutex;
+
+const IOAPIC_IRQ_RANGE: Range<usize> = X86_INT_BASE..X86_INT_LOCAL_APIC_BASE;
+const LAPIC_IRQ_RANGE: Range<usize> = 0..16;
+
+type Phys2VirtFn = fn(paddr: PhysAddr) -> VirtAddr;
+
+/// Advanced Programmable Interrupt Controller
+pub struct Apic {
+    ioapic_list: IoApicList,
+    manager_ioapic: Mutex<IrqManager<256>>,
+    manager_lapic: Mutex<IrqManager<16>>,
+}
+
+impl Apic {
+    /// Construct a new `Apic`.
+    pub fn new(acpi_rsdp: usize, phys_to_virt: Phys2VirtFn) -> Self {
+        Self {
+            ioapic_list: IoApicList::new(acpi_rsdp, phys_to_virt),
+            manager_ioapic: Mutex::new(IrqManager::new(IOAPIC_IRQ_RANGE)),
+            manager_lapic: Mutex::new(IrqManager::new(LAPIC_IRQ_RANGE)),
+        }
+    }
+
+    fn with_ioapic<F>(&self, gsi: u32, op: F) -> DeviceResult
+    where
+        F: FnOnce(&IoApic) -> DeviceResult,
+    {
+        if let Some(apic) = self.ioapic_list.find(gsi) {
+            op(apic)
+        } else {
+            error!(
+                "cannot find IOAPIC for global system interrupt number {}",
+                gsi
+            );
+            Err(DeviceError::InvalidParam)
+        }
+    }
+
+    pub fn init_local_apic_bsp(phys_to_virt: Phys2VirtFn) {
+        unsafe { LocalApic::init_bsp(phys_to_virt) }
+    }
+
+    pub fn init_local_apic_ap() {
+        unsafe { LocalApic::init_ap() }
+    }
+
+    pub fn local_apic<'a>() -> &'a mut LocalApic {
+        unsafe { LocalApic::get() }
+    }
+
+    pub fn register_local_apic_handler(&self, vector: usize, handler: IrqHandler) -> DeviceResult {
+        if vector >= X86_INT_LOCAL_APIC_BASE {
+            self.manager_lapic
+                .lock()
+                .register_handler(vector - X86_INT_LOCAL_APIC_BASE, handler)?;
+            Ok(())
+        } else {
+            error!("invalid local APIC interrupt vector {}", vector);
+            Err(DeviceError::InvalidParam)
+        }
+    }
+}
+
+impl Scheme for Apic {
+    fn name(&self) -> &str {
+        "x86-apic"
+    }
+
+    fn handle_irq(&self, vector: usize) {
+        Self::local_apic().eoi();
+        let res = if vector >= X86_INT_LOCAL_APIC_BASE {
+            let handler = self.manager_lapic.lock();
+            handler.handle(vector - X86_INT_LOCAL_APIC_BASE)
+        } else {
+            self.manager_ioapic.lock().handle(vector)
+        };
+        if res.is_err() {
+            warn!("no registered handler for interrupt vector {}!", vector);
+        }
+    }
+}
+
+impl IrqScheme for Apic {
+    fn is_valid_irq(&self, gsi: usize) -> bool {
+        self.ioapic_list.find(gsi as _).is_some()
+    }
+
+    fn mask(&self, gsi: usize) -> DeviceResult {
+        self.with_ioapic(gsi as _, |apic| {
+            apic.toggle(gsi as _, false);
+            Ok(())
+        })
+    }
+
+    fn unmask(&self, gsi: usize) -> DeviceResult {
+        self.with_ioapic(gsi as _, |apic| {
+            apic.toggle(gsi as _, true);
+            Ok(())
+        })
+    }
+
+    fn configure(&self, gsi: usize, tm: IrqTriggerMode, pol: IrqPolarity) -> DeviceResult {
+        let gsi = gsi as u32;
+        self.with_ioapic(gsi, |apic| {
+            apic.configure(gsi, tm, pol, LocalApic::bsp_id(), 0);
+            Ok(())
+        })
+    }
+
+    fn register_handler(&self, gsi: usize, handler: IrqHandler) -> DeviceResult {
+        let gsi = gsi as u32;
+        self.with_ioapic(gsi, |apic| {
+            let vector = apic.get_vector(gsi) as _; // if not mapped, allocate an available vector by `register_handler()`.
+            let vector = self
+                .manager_ioapic
+                .lock()
+                .register_handler(vector, handler)? as u8;
+            apic.map_vector(gsi, vector);
+            Ok(())
+        })
+    }
+
+    fn unregister(&self, gsi: usize) -> DeviceResult {
+        let gsi = gsi as u32;
+        self.with_ioapic(gsi, |apic| {
+            let vector = apic.get_vector(gsi) as _;
+            self.manager_ioapic.lock().unregister_handler(vector)?;
+            apic.map_vector(gsi, 0);
+            Ok(())
+        })
+    }
+
+    fn msi_alloc_block(&self, requested_irqs: usize) -> DeviceResult<Range<usize>> {
+        let alloc_size = requested_irqs.next_power_of_two();
+        let start = self.manager_ioapic.lock().alloc_block(alloc_size)?;
+        Ok(start..start + alloc_size)
+    }
+
+    fn msi_free_block(&self, block: Range<usize>) -> DeviceResult {
+        self.manager_lapic
+            .lock()
+            .free_block(block.start, block.len())
+    }
+
+    fn msi_register_handler(
+        &self,
+        block: Range<usize>,
+        msi_id: usize,
+        handler: IrqHandler,
+    ) -> DeviceResult {
+        if msi_id < block.len() {
+            self.manager_ioapic
+                .lock()
+                .overwrite_handler(block.start + msi_id, handler)
+        } else {
+            Err(DeviceError::InvalidParam)
+        }
+    }
+
+    fn apic_timer_enable(&self) {
+        // SAFETY: this will called only once for every core
+        Apic::local_apic().enable_timer();
+    }
+}
--- a/drivers/src/lib.rs
+++ b/drivers/src/lib.rs
@ -0,0 +1,103 @@
+//! Device drivers of zCore.
+
+#![cfg_attr(not(feature = "mock"), no_std)]
+#![feature(doc_cfg)]
+
+extern crate alloc;
+
+#[macro_use]
+extern crate log;
+
+use alloc::sync::Arc;
+use core::fmt;
+
+#[cfg(any(feature = "mock", doc))]
+#[doc(cfg(feature = "mock"))]
+pub mod mock;
+
+#[cfg(any(feature = "virtio", doc))]
+#[doc(cfg(feature = "virtio"))]
+pub mod virtio;
+
+pub mod builder;
+pub mod bus;
+pub mod display;
+pub mod input;
+pub mod io;
+pub mod irq;
+pub mod net;
+pub mod prelude;
+pub mod scheme;
+pub mod uart;
+pub mod utils;
+
+/// The error type for external device.
+#[derive(Debug)]
+pub enum DeviceError {
+    /// The buffer is too small.
+    BufferTooSmall,
+    /// The device is not ready.
+    NotReady,
+    /// Invalid parameter.
+    InvalidParam,
+    /// Failed to alloc DMA memory.
+    DmaError,
+    /// I/O Error
+    IoError,
+    /// A resource with the specified identifier already exists.
+    AlreadyExists,
+    /// No resource to allocate.
+    NoResources,
+    /// The device driver is not implemented, supported, or enabled.
+    NotSupported,
+}
+
+/// A type alias for the result of a device operation.
+pub type DeviceResult<T = ()> = core::result::Result<T, DeviceError>;
+
+/// Static shell of shared dynamic device [`Scheme`](crate::scheme::Scheme) types.
+#[derive(Clone)]
+pub enum Device {
+    /// Block device
+    Block(Arc<dyn scheme::BlockScheme>),
+    /// Display device
+    Display(Arc<dyn scheme::DisplayScheme>),
+    /// Input device
+    Input(Arc<dyn scheme::InputScheme>),
+    /// Interrupt request and handle
+    Irq(Arc<dyn scheme::IrqScheme>),
+    /// Network device
+    Net(Arc<dyn scheme::NetScheme>),
+    /// Uart port
+    Uart(Arc<dyn scheme::UartScheme>),
+}
+
+impl Device {
+    /// Get a general [`Scheme`](scheme::Scheme) from the device.
+    pub fn inner(&self) -> Arc<dyn scheme::Scheme> {
+        match self {
+            Self::Block(d) => d.clone().upcast(),
+            Self::Display(d) => d.clone().upcast(),
+            Self::Input(d) => d.clone().upcast(),
+            Self::Irq(d) => d.clone().upcast(),
+            Self::Net(d) => d.clone().upcast(),
+            Self::Uart(d) => d.clone().upcast(),
+        }
+    }
+}
+
+impl fmt::Debug for Device {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            Self::Block(d) => write!(f, "BlockDevice({:?})", d.name()),
+            Self::Display(d) => write!(f, "DisplayDevice({:?})", d.name()),
+            Self::Input(d) => write!(f, "InputDevice({:?})", d.name()),
+            Self::Irq(d) => write!(f, "IrqDevice({:?})", d.name()),
+            Self::Net(d) => write!(f, "NetDevice({:?})", d.name()),
+            Self::Uart(d) => write!(f, "UartDevice({:?})", d.name()),
+        }
+    }
+}
+
+type PhysAddr = usize;
+type VirtAddr = usize;
--- a/drivers/src/mock/display.rs
+++ b/drivers/src/mock/display.rs
@ -0,0 +1,64 @@
+use alloc::vec::Vec;
+
+use crate::prelude::{ColorFormat, DisplayInfo, FrameBuffer};
+use crate::scheme::{DisplayScheme, Scheme};
+
+pub struct MockDisplay {
+    info: DisplayInfo,
+    fb: Vec<u8>,
+}
+
+impl MockDisplay {
+    pub fn new(width: u32, height: u32, format: ColorFormat) -> Self {
+        let fb_size = (width * height * format.bytes() as u32) as usize;
+        let fb = vec![0; fb_size];
+        let info = DisplayInfo {
+            width,
+            height,
+            format,
+            fb_base_vaddr: fb.as_ptr() as usize,
+            fb_size,
+        };
+        Self { info, fb }
+    }
+
+    /// # Safety
+    ///
+    /// This function is unsafe, the caller must ensure the `ptr` points to the
+    /// start of a valid frame buffer.
+    pub unsafe fn from_raw_parts(
+        width: u32,
+        height: u32,
+        format: ColorFormat,
+        ptr: *mut u8,
+    ) -> Self {
+        let fb_size = (width * height * format.bytes() as u32) as usize;
+        let fb = Vec::from_raw_parts(ptr, fb_size, fb_size);
+        let info = DisplayInfo {
+            width,
+            height,
+            format,
+            fb_base_vaddr: fb.as_ptr() as usize,
+            fb_size,
+        };
+        Self { info, fb }
+    }
+}
+
+impl Scheme for MockDisplay {
+    fn name(&self) -> &str {
+        "mock-display"
+    }
+}
+
+impl DisplayScheme for MockDisplay {
+    #[inline]
+    fn info(&self) -> DisplayInfo {
+        self.info
+    }
+
+    #[inline]
+    fn fb(&self) -> FrameBuffer {
+        unsafe { FrameBuffer::from_raw_parts_mut(self.fb.as_ptr() as _, self.info.fb_size) }
+    }
+}
--- a/drivers/src/mock/graphic/mod.rs
+++ b/drivers/src/mock/graphic/mod.rs
@ -0,0 +1 @@
+pub mod sdl;
--- a/drivers/src/mock/graphic/sdl.rs
+++ b/drivers/src/mock/graphic/sdl.rs
@ -0,0 +1,423 @@
+use alloc::sync::Arc;
+
+use sdl2::{event::Event, EventPump};
+use sdl2::{keyboard::Scancode, mouse::MouseButton};
+use sdl2::{pixels::PixelFormatEnum, render::Canvas, video::Window};
+
+use crate::input::input_event_codes::{key::*, rel::*, syn::*};
+use crate::prelude::{ColorFormat, InputEvent, InputEventType};
+use crate::scheme::{DisplayScheme, InputScheme};
+
+pub struct SdlWindow {
+    canvas: Canvas<Window>,
+    event_pump: EventPump,
+    display: Arc<dyn DisplayScheme>,
+    handler: EventHandler,
+    is_quit: bool,
+}
+
+impl SdlWindow {
+    pub fn new(title: &str, display: Arc<dyn DisplayScheme>) -> Self {
+        let sdl_context = sdl2::init().unwrap();
+        let video_subsystem = sdl_context.video().unwrap();
+        let window = video_subsystem
+            .window(title, display.info().width, display.info().height)
+            .position_centered()
+            .build()
+            .unwrap();
+
+        let event_pump = sdl_context.event_pump().unwrap();
+        let canvas = window.into_canvas().build().unwrap();
+        let mut ret = Self {
+            canvas,
+            event_pump,
+            display,
+            handler: EventHandler::default(),
+            is_quit: false,
+        };
+        ret.flush();
+        ret
+    }
+
+    pub fn is_quit(&self) -> bool {
+        self.is_quit
+    }
+
+    pub fn register_mouse(&mut self, mouse: Arc<dyn InputScheme>) {
+        self.handler.mouse = Some(mouse);
+    }
+
+    pub fn register_keyboard(&mut self, keyboard: Arc<dyn InputScheme>) {
+        self.handler.keyboard = Some(keyboard);
+    }
+
+    pub fn flush(&mut self) {
+        let info = self.display.info();
+        let texture_creator = self.canvas.texture_creator();
+        let format: PixelFormatEnum = info.format.into();
+        let mut texture = texture_creator
+            .create_texture_streaming(format, info.width, info.height)
+            .unwrap();
+
+        texture
+            .update(None, &self.display.fb(), info.pitch() as usize)
+            .unwrap();
+        self.canvas.copy(&texture, None, None).unwrap();
+        self.canvas.present();
+    }
+
+    pub fn handle_events(&mut self) {
+        for event in self.event_pump.poll_iter() {
+            match event {
+                Event::Quit { .. } => self.is_quit = true,
+                Event::MouseMotion { xrel, yrel, .. } => self.handler.mouse_move(xrel, yrel),
+                Event::MouseButtonDown { mouse_btn, .. } => {
+                    self.handler.mouse_button(mouse_btn, true)
+                }
+                Event::MouseButtonUp { mouse_btn, .. } => {
+                    self.handler.mouse_button(mouse_btn, false)
+                }
+                Event::KeyDown {
+                    scancode: Some(code),
+                    ..
+                } => {
+                    self.handler.key(code, true);
+                    if code == Scancode::Escape {
+                        self.is_quit = true;
+                    }
+                }
+                Event::KeyUp {
+                    scancode: Some(code),
+                    ..
+                } => self.handler.key(code, false),
+                _ => {}
+            }
+        }
+    }
+}
+
+#[derive(Default)]
+struct EventHandler {
+    mouse: Option<Arc<dyn InputScheme>>,
+    keyboard: Option<Arc<dyn InputScheme>>,
+}
+
+impl EventHandler {
+    fn mouse_move(&self, rel_x: i32, rel_y: i32) {
+        if let Some(ref m) = self.mouse {
+            m.trigger(InputEvent {
+                event_type: InputEventType::RelAxis,
+                code: REL_X,
+                value: rel_x,
+            });
+            m.trigger(InputEvent {
+                event_type: InputEventType::RelAxis,
+                code: REL_Y,
+                value: rel_y,
+            });
+            m.trigger(InputEvent {
+                event_type: InputEventType::Syn,
+                code: SYN_REPORT,
+                value: 0,
+            });
+        }
+    }
+
+    fn mouse_button(&self, btn: MouseButton, down: bool) {
+        if let Some(ref m) = self.mouse {
+            let code = match btn {
+                MouseButton::Left => BTN_LEFT,
+                MouseButton::Right => BTN_RIGHT,
+                MouseButton::Middle => BTN_MIDDLE,
+                _ => return,
+            };
+            let value = if down { 1 } else { 0 };
+            m.trigger(InputEvent {
+                event_type: InputEventType::Key,
+                code,
+                value,
+            });
+            m.trigger(InputEvent {
+                event_type: InputEventType::Syn,
+                code: SYN_REPORT,
+                value: 0,
+            });
+        }
+    }
+
+    fn key(&self, scancode: Scancode, down: bool) {
+        if let Some(ref m) = self.keyboard {
+            if let Some(code) = scancode_2_eventcode(scancode) {
+                let value = if down { 1 } else { 0 };
+                m.trigger(InputEvent {
+                    event_type: InputEventType::Key,
+                    code,
+                    value,
+                });
+                m.trigger(InputEvent {
+                    event_type: InputEventType::Syn,
+                    code: SYN_REPORT,
+                    value: 0,
+                });
+            }
+        }
+    }
+}
+
+impl core::convert::From<ColorFormat> for PixelFormatEnum {
+    fn from(format: ColorFormat) -> Self {
+        match format {
+            ColorFormat::RGB332 => Self::RGB332,
+            ColorFormat::RGB565 => Self::RGB565,
+            ColorFormat::RGB888 => Self::BGR24, // notice: BGR24 means R at the highest address, B at the lowest address.
+            ColorFormat::ARGB8888 => Self::ARGB8888,
+        }
+    }
+}
+
+fn scancode_2_eventcode(code: Scancode) -> Option<u16> {
+    use Scancode::*;
+    Some(match code {
+        A => KEY_A,
+        B => KEY_B,
+        C => KEY_C,
+        D => KEY_D,
+        E => KEY_E,
+        F => KEY_F,
+        G => KEY_G,
+        H => KEY_H,
+        I => KEY_I,
+        J => KEY_J,
+        K => KEY_K,
+        L => KEY_L,
+        M => KEY_M,
+        N => KEY_N,
+        O => KEY_O,
+        P => KEY_P,
+        Q => KEY_Q,
+        R => KEY_R,
+        S => KEY_S,
+        T => KEY_T,
+        U => KEY_U,
+        V => KEY_V,
+        W => KEY_W,
+        X => KEY_X,
+        Y => KEY_Y,
+        Z => KEY_Z,
+        Num1 => KEY_1,
+        Num2 => KEY_2,
+        Num3 => KEY_3,
+        Num4 => KEY_4,
+        Num5 => KEY_5,
+        Num6 => KEY_6,
+        Num7 => KEY_7,
+        Num8 => KEY_8,
+        Num9 => KEY_9,
+        Num0 => KEY_0,
+        Return => KEY_ENTER,
+        Escape => KEY_ESC,
+        Backspace => KEY_BACKSPACE,
+        Tab => KEY_TAB,
+        Space => KEY_SPACE,
+        Minus => KEY_MINUS,
+        Equals => KEY_EQUAL,
+        LeftBracket => KEY_LEFTBRACE,
+        RightBracket => KEY_RIGHTBRACE,
+        Backslash => KEY_BACKSLASH,
+        NonUsHash => return None,
+        Semicolon => KEY_SEMICOLON,
+        Apostrophe => KEY_APOSTROPHE,
+        Grave => KEY_GRAVE,
+        Comma => KEY_COMMA,
+        Period => KEY_DOT,
+        Slash => KEY_SLASH,
+        CapsLock => KEY_CAPSLOCK,
+        F1 => KEY_F1,
+        F2 => KEY_F2,
+        F3 => KEY_F3,
+        F4 => KEY_F4,
+        F5 => KEY_F5,
+        F6 => KEY_F6,
+        F7 => KEY_F7,
+        F8 => KEY_F8,
+        F9 => KEY_F9,
+        F10 => KEY_F10,
+        F11 => KEY_F11,
+        F12 => KEY_F12,
+        PrintScreen => return None,
+        ScrollLock => KEY_SCROLLLOCK,
+        Pause => KEY_PAUSE,
+        Insert => KEY_INSERT,
+        Home => KEY_HOME,
+        PageUp => KEY_PAGEUP,
+        Delete => KEY_DELETE,
+        End => KEY_END,
+        PageDown => KEY_PAGEDOWN,
+        Right => KEY_RIGHT,
+        Left => KEY_LEFT,
+        Down => KEY_DOWN,
+        Up => KEY_UP,
+        NumLockClear => KEY_NUMLOCK,
+        KpDivide => KEY_KPSLASH,
+        KpMultiply => KEY_KPASTERISK,
+        KpMinus => KEY_KPMINUS,
+        KpPlus => KEY_KPPLUS,
+        KpEnter => KEY_KPENTER,
+        Kp1 => KEY_KP1,
+        Kp2 => KEY_KP2,
+        Kp3 => KEY_KP3,
+        Kp4 => KEY_KP4,
+        Kp5 => KEY_KP5,
+        Kp6 => KEY_KP6,
+        Kp7 => KEY_KP7,
+        Kp8 => KEY_KP8,
+        Kp9 => KEY_KP9,
+        Kp0 => KEY_KP0,
+        KpPeriod => KEY_KPDOT,
+        NonUsBackslash => KEY_102ND,
+        Application => return None,
+        Power => KEY_POWER,
+        KpEquals => KEY_KPEQUAL,
+        F13 => KEY_F13,
+        F14 => KEY_F14,
+        F15 => KEY_F15,
+        F16 => KEY_F16,
+        F17 => KEY_F17,
+        F18 => KEY_F18,
+        F19 => KEY_F19,
+        F20 => KEY_F20,
+        F21 => KEY_F21,
+        F22 => KEY_F22,
+        F23 => KEY_F23,
+        F24 => KEY_F24,
+        Execute => return None,
+        Help => KEY_HELP,
+        Menu => KEY_MENU,
+        Select => return None,
+        Stop => KEY_STOP,
+        Again => KEY_AGAIN,
+        Undo => KEY_UNDO,
+        Cut => KEY_CUT,
+        Copy => KEY_COPY,
+        Paste => KEY_PASTE,
+        Find => KEY_FIND,
+        Mute => KEY_MUTE,
+        VolumeUp => KEY_VOLUMEUP,
+        VolumeDown => KEY_VOLUMEDOWN,
+        KpComma => KEY_KPCOMMA,
+        KpEqualsAS400 => return None,
+        International1 => KEY_RO,
+        International2 => KEY_KATAKANAHIRAGANA,
+        International3 => KEY_YEN,
+        International4 => KEY_HENKAN,
+        International5 => KEY_MUHENKAN,
+        International6 => return None,
+        International7 => return None,
+        International8 => return None,
+        International9 => return None,
+        Lang1 => KEY_HANGEUL,
+        Lang2 => KEY_HANJA,
+        Lang3 => KEY_KATAKANA,
+        Lang4 => KEY_HIRAGANA,
+        Lang5 => return None,
+        Lang6 => return None,
+        Lang7 => return None,
+        Lang8 => return None,
+        Lang9 => return None,
+        AltErase => KEY_ALTERASE,
+        SysReq => KEY_SYSRQ,
+        Cancel => KEY_CANCEL,
+        Clear => return None,
+        Prior => return None,
+        Return2 => return None,
+        Separator => return None,
+        Out => return None,
+        Oper => return None,
+        ClearAgain => return None,
+        CrSel => return None,
+        ExSel => return None,
+        Kp00 => return None,
+        Kp000 => return None,
+        ThousandsSeparator => return None,
+        DecimalSeparator => return None,
+        CurrencyUnit => return None,
+        CurrencySubUnit => return None,
+        KpLeftParen => KEY_KPLEFTPAREN,
+        KpRightParen => KEY_KPRIGHTPAREN,
+        KpLeftBrace => return None,
+        KpRightBrace => return None,
+        KpTab => return None,
+        KpBackspace => return None,
+        KpA => return None,
+        KpB => return None,
+        KpC => return None,
+        KpD => return None,
+        KpE => return None,
+        KpF => return None,
+        KpXor => return None,
+        KpPower => return None,
+        KpPercent => return None,
+        KpLess => return None,
+        KpGreater => return None,
+        KpAmpersand => return None,
+        KpDblAmpersand => return None,
+        KpVerticalBar => return None,
+        KpDblVerticalBar => return None,
+        KpColon => return None,
+        KpHash => return None,
+        KpSpace => return None,
+        KpAt => return None,
+        KpExclam => return None,
+        KpMemStore => return None,
+        KpMemRecall => return None,
+        KpMemClear => return None,
+        KpMemAdd => return None,
+        KpMemSubtract => return None,
+        KpMemMultiply => return None,
+        KpMemDivide => return None,
+        KpPlusMinus => KEY_KPPLUSMINUS,
+        KpClear => return None,
+        KpClearEntry => return None,
+        KpBinary => return None,
+        KpOctal => return None,
+        KpDecimal => return None,
+        KpHexadecimal => return None,
+        LCtrl => KEY_LEFTCTRL,
+        LShift => KEY_LEFTSHIFT,
+        LAlt => KEY_LEFTALT,
+        LGui => KEY_LEFTMETA,
+        RCtrl => KEY_RIGHTCTRL,
+        RShift => KEY_RIGHTSHIFT,
+        RAlt => KEY_RIGHTALT,
+        RGui => KEY_RIGHTMETA,
+        Mode => return None,
+        AudioNext => KEY_NEXTSONG,
+        AudioPrev => KEY_PREVIOUSSONG,
+        AudioStop => return None,
+        AudioPlay => KEY_PLAYPAUSE,
+        AudioMute => return None,
+        MediaSelect => return None,
+        Www => return None,
+        Mail => KEY_MAIL,
+        Calculator => KEY_CALC,
+        Computer => KEY_COMPUTER,
+        AcSearch => KEY_SEARCH,
+        AcHome => KEY_HOMEPAGE,
+        AcBack => KEY_BACK,
+        AcForward => KEY_FORWARD,
+        AcStop => return None,
+        AcRefresh => KEY_REFRESH,
+        AcBookmarks => KEY_BOOKMARKS,
+        BrightnessDown => KEY_BRIGHTNESSDOWN,
+        BrightnessUp => KEY_BRIGHTNESSUP,
+        DisplaySwitch => KEY_SWITCHVIDEOMODE,
+        KbdIllumToggle => KEY_KBDILLUMTOGGLE,
+        KbdIllumDown => KEY_KBDILLUMDOWN,
+        KbdIllumUp => KEY_KBDILLUMUP,
+        Eject => KEY_EJECTCD,
+        Sleep => KEY_SLEEP,
+        App1 => return None,
+        App2 => return None,
+        Num => return None,
+    })
+}
--- a/drivers/src/mock/input.rs
+++ b/drivers/src/mock/input.rs
@ -0,0 +1,57 @@
+use crate::input::input_event_codes::{ev::*, key::*, rel::*};
+use crate::prelude::{CapabilityType, InputCapability, InputEvent};
+use crate::scheme::{impl_event_scheme, InputScheme, Scheme};
+use crate::utils::EventListener;
+
+#[derive(Default)]
+pub struct MockMouse {
+    listener: EventListener<InputEvent>,
+}
+
+impl_event_scheme!(MockMouse, InputEvent);
+
+impl Scheme for MockMouse {
+    fn name(&self) -> &str {
+        "mock-mouse-input"
+    }
+}
+
+impl InputScheme for MockMouse {
+    fn capability(&self, cap_type: CapabilityType) -> InputCapability {
+        let mut cap = InputCapability::empty();
+        match cap_type {
+            CapabilityType::Event => cap.set_all(&[EV_KEY, EV_REL]),
+            CapabilityType::Key => cap.set_all(&[BTN_LEFT, BTN_RIGHT, BTN_MIDDLE]),
+            CapabilityType::RelAxis => cap.set_all(&[REL_X, REL_Y, REL_HWHEEL]),
+            _ => {}
+        }
+        cap
+    }
+}
+
+#[derive(Default)]
+pub struct MockKeyboard {
+    listener: EventListener<InputEvent>,
+}
+
+impl_event_scheme!(MockKeyboard, InputEvent);
+
+impl Scheme for MockKeyboard {
+    fn name(&self) -> &str {
+        "mock-keyboard-input"
+    }
+}
+
+impl InputScheme for MockKeyboard {
+    fn capability(&self, cap_type: CapabilityType) -> InputCapability {
+        let mut cap = InputCapability::empty();
+        match cap_type {
+            CapabilityType::Event => cap.set(EV_KEY),
+            CapabilityType::Key => {
+                // TODO
+            }
+            _ => {}
+        }
+        cap
+    }
+}
--- a/drivers/src/mock/mod.rs
+++ b/drivers/src/mock/mod.rs
@ -0,0 +1,9 @@
+//! Mock devices, including display, input, uart and graphic.
+
+pub mod display;
+pub mod input;
+pub mod uart;
+
+#[cfg(any(feature = "graphic", doc))]
+#[doc(cfg(feature = "graphic"))]
+pub mod graphic;
--- a/drivers/src/mock/uart.rs
+++ b/drivers/src/mock/uart.rs
@ -0,0 +1,110 @@
+use std::collections::VecDeque;
+
+use async_std::{io, io::prelude::*, task};
+use lock::Mutex;
+
+use crate::scheme::{impl_event_scheme, Scheme, UartScheme};
+use crate::utils::EventListener;
+use crate::DeviceResult;
+
+const UART_BUF_LEN: usize = 256;
+
+lazy_static::lazy_static! {
+    static ref UART_BUF: Mutex<VecDeque<u8>> = Mutex::new(VecDeque::with_capacity(UART_BUF_LEN));
+}
+
+pub struct MockUart {
+    listener: EventListener,
+}
+
+impl_event_scheme!(MockUart);
+
+impl MockUart {
+    pub fn new() -> Self {
+        Self {
+            listener: EventListener::new(),
+        }
+    }
+
+    pub fn start_irq_service(irq_handler: impl Fn() + Send + Sync + 'static) {
+        task::spawn(async move {
+            loop {
+                let mut buf = [0; UART_BUF_LEN];
+                let remains = UART_BUF_LEN - UART_BUF.lock().len();
+                if remains > 0 {
+                    if let Ok(n) = io::stdin().read(&mut buf[..remains]).await {
+                        {
+                            let mut uart_buf = UART_BUF.lock();
+                            for c in &buf[..n] {
+                                uart_buf.push_back(*c);
+                            }
+                        }
+                        irq_handler();
+                    }
+                }
+                task::yield_now().await;
+            }
+        });
+    }
+}
+
+impl Default for MockUart {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl Scheme for MockUart {
+    fn name(&self) -> &str {
+        "mock-uart"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        self.listener.trigger(());
+    }
+}
+
+impl UartScheme for MockUart {
+    fn try_recv(&self) -> DeviceResult<Option<u8>> {
+        if let Some(c) = UART_BUF.lock().pop_front() {
+            Ok(Some(c))
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn send(&self, ch: u8) -> DeviceResult {
+        eprint!("{}", ch as char);
+        Ok(())
+    }
+
+    fn write_str(&self, s: &str) -> DeviceResult {
+        eprint!("{}", s);
+        Ok(())
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use std::sync::Arc;
+
+    #[test]
+    fn test_mock_uart() {
+        let uart = Arc::new(MockUart::new());
+        let u = uart.clone();
+        MockUart::start_irq_service(move || u.handle_irq(0));
+
+        uart.write_str("Hello, World!\n").unwrap();
+        uart.write_str(format!("{} + {} = {}\n", 1, 2, 1 + 2).as_str())
+            .unwrap();
+
+        std::thread::sleep(std::time::Duration::from_millis(100));
+        if let Some(ch) = uart.try_recv().unwrap() {
+            uart.write_str(format!("received data: {:?}({:#x})\n", ch as char, ch).as_str())
+                .unwrap();
+        } else {
+            uart.write_str("no data to receive\n").unwrap();
+        }
+    }
+}
--- a/drivers/src/net/e1000.rs
+++ b/drivers/src/net/e1000.rs
@ -0,0 +1,218 @@
+//! Intel PRO/1000 Network Adapter i.e. e1000 network driver
+//! Datasheet: https://www.intel.ca/content/dam/doc/datasheet/82574l-gbe-controller-datasheet.pdf
+
+use alloc::collections::BTreeMap;
+use alloc::string::String;
+use alloc::sync::Arc;
+use alloc::vec::Vec;
+
+use smoltcp::iface::*;
+use smoltcp::phy::{self, DeviceCapabilities};
+use smoltcp::time::Instant;
+use smoltcp::wire::*;
+use smoltcp::Result;
+
+use super::ProviderImpl;
+use super::PAGE_SIZE;
+use crate::net::get_sockets;
+use crate::scheme::{NetScheme, Scheme};
+use crate::{DeviceError, DeviceResult};
+use isomorphic_drivers::net::ethernet::intel::e1000::E1000;
+use isomorphic_drivers::net::ethernet::structs::EthernetAddress as DriverEthernetAddress;
+use lock::Mutex;
+
+#[derive(Clone)]
+pub struct E1000Driver(Arc<Mutex<E1000<ProviderImpl>>>);
+
+#[derive(Clone)]
+pub struct E1000Interface {
+    iface: Arc<Mutex<Interface<'static, E1000Driver>>>,
+    driver: E1000Driver,
+    name: String,
+    irq: usize,
+}
+
+impl Scheme for E1000Interface {
+    fn name(&self) -> &str {
+        "e1000"
+    }
+
+    fn handle_irq(&self, irq: usize) {
+        if irq != self.irq {
+            // not ours, skip it
+            return;
+        }
+
+        let data = self.driver.0.lock().handle_interrupt();
+
+        if data {
+            //let timestamp = Instant::from_millis(crate::trap::uptime_msec() as i64);
+            // Fix me
+            let timestamp = Instant::from_millis(0);
+            let sockets = get_sockets();
+            let mut sockets = sockets.lock();
+            match self.iface.lock().poll(&mut sockets, timestamp) {
+                Ok(p) => {
+                    //SOCKET_ACTIVITY.notify_all();
+                    info!("e1000 try_handle_interrupt poll: {:?}", p);
+                }
+                Err(err) => {
+                    warn!("poll got err {}", err);
+                }
+            }
+        }
+    }
+}
+
+impl NetScheme for E1000Interface {
+    fn get_mac(&self) -> EthernetAddress {
+        self.iface.lock().ethernet_addr()
+    }
+
+    fn get_ifname(&self) -> String {
+        self.name.clone()
+    }
+
+    // get ip addresses
+    fn get_ip_address(&self) -> Vec<IpCidr> {
+        Vec::from(self.iface.lock().ip_addrs())
+    }
+
+    fn poll(&self) -> DeviceResult {
+        //let timestamp = Instant::from_millis(crate::trap::uptime_msec() as i64);
+        let timestamp = Instant::from_millis(0);
+        let sockets = get_sockets();
+        let mut sockets = sockets.lock();
+        match self.iface.lock().poll(&mut sockets, timestamp) {
+            Ok(p) => {
+                //SOCKET_ACTIVITY.notify_all();
+                info!("e1000 NetScheme poll: {:?}", p);
+                Ok(())
+            }
+            Err(err) => {
+                warn!("poll got err {}", err);
+                Err(DeviceError::IoError)
+            }
+        }
+    }
+
+    fn recv(&self, buf: &mut [u8]) -> DeviceResult<usize> {
+        if let Some(vec_recv) = self.driver.0.lock().receive() {
+            buf.copy_from_slice(&vec_recv);
+            Ok(vec_recv.len())
+        } else {
+            Err(DeviceError::NotReady)
+        }
+    }
+
+    fn send(&self, data: &[u8]) -> DeviceResult<usize> {
+        if self.driver.0.lock().can_send() {
+            let mut driver = self.driver.0.lock();
+            driver.send(data);
+            Ok(data.len())
+        } else {
+            Err(DeviceError::NotReady)
+        }
+    }
+}
+
+pub struct E1000RxToken(Vec<u8>);
+pub struct E1000TxToken(E1000Driver);
+
+impl phy::Device<'_> for E1000Driver {
+    type RxToken = E1000RxToken;
+    type TxToken = E1000TxToken;
+
+    fn receive(&mut self) -> Option<(Self::RxToken, Self::TxToken)> {
+        self.0
+            .lock()
+            .receive()
+            .map(|vec| (E1000RxToken(vec), E1000TxToken(self.clone())))
+    }
+
+    fn transmit(&mut self) -> Option<Self::TxToken> {
+        if self.0.lock().can_send() {
+            Some(E1000TxToken(self.clone()))
+        } else {
+            None
+        }
+    }
+
+    fn capabilities(&self) -> DeviceCapabilities {
+        let mut caps = DeviceCapabilities::default();
+        caps.max_transmission_unit = 1536;
+        caps.max_burst_size = Some(64);
+        caps
+    }
+}
+
+impl phy::RxToken for E1000RxToken {
+    fn consume<R, F>(mut self, _timestamp: Instant, f: F) -> Result<R>
+    where
+        F: FnOnce(&mut [u8]) -> Result<R>,
+    {
+        f(&mut self.0)
+    }
+}
+
+impl phy::TxToken for E1000TxToken {
+    fn consume<R, F>(self, _timestamp: Instant, len: usize, f: F) -> Result<R>
+    where
+        F: FnOnce(&mut [u8]) -> Result<R>,
+    {
+        let mut buffer = [0u8; PAGE_SIZE];
+        let result = f(&mut buffer[..len]);
+
+        let mut driver = (self.0).0.lock();
+        driver.send(&buffer);
+
+        result
+    }
+}
+
+// JudgeDuck-OS/kern/e1000.c
+pub fn init(
+    name: String,
+    irq: usize,
+    header: usize,
+    size: usize,
+    index: usize,
+) -> DeviceResult<E1000Interface> {
+    info!("Probing e1000 {}", name);
+
+    // randomly generated
+    let mac: [u8; 6] = [0x54, 0x51, 0x9F, 0x71, 0xC0, index as u8];
+
+    let e1000 = E1000::new(header, size, DriverEthernetAddress::from_bytes(&mac));
+
+    let net_driver = E1000Driver(Arc::new(Mutex::new(e1000)));
+
+    let ethernet_addr = EthernetAddress::from_bytes(&mac);
+    let ip_addrs = [IpCidr::new(IpAddress::v4(10, 0, 2, (15 + index) as u8), 24)];
+    let default_v4_gw = Ipv4Address::new(10, 0, 2, 2); //Qemu user network gateway: 10.0.2.2
+    static mut ROUTES_STORAGE: [Option<(IpCidr, Route)>; 1] = [None; 1];
+    let mut routes = unsafe { Routes::new(&mut ROUTES_STORAGE[..]) };
+    routes.add_default_ipv4_route(default_v4_gw).unwrap();
+
+    let neighbor_cache = NeighborCache::new(BTreeMap::new());
+    let iface = InterfaceBuilder::new(net_driver.clone())
+        .ethernet_addr(ethernet_addr)
+        .neighbor_cache(neighbor_cache)
+        .ip_addrs(ip_addrs)
+        .routes(routes)
+        .finalize();
+
+    info!(
+        "e1000 interface {} up with addr 10.0.2.{}/24",
+        name,
+        15 + index
+    );
+    let e1000_iface = E1000Interface {
+        iface: Arc::new(Mutex::new(iface)),
+        driver: net_driver,
+        name,
+        irq,
+    };
+
+    Ok(e1000_iface)
+}
--- a/drivers/src/net/loopback.rs
+++ b/drivers/src/net/loopback.rs
@ -0,0 +1,60 @@
+// smoltcp
+use smoltcp::{iface::Interface, phy::Loopback, time::Instant};
+
+use crate::net::get_sockets;
+use alloc::sync::Arc;
+
+use alloc::string::String;
+use lock::Mutex;
+
+use crate::scheme::{NetScheme, Scheme};
+use crate::{DeviceError, DeviceResult};
+
+use alloc::vec::Vec;
+use smoltcp::wire::EthernetAddress;
+use smoltcp::wire::IpCidr;
+
+#[derive(Clone)]
+pub struct LoopbackInterface {
+    pub iface: Arc<Mutex<Interface<'static, Loopback>>>,
+    pub name: String,
+}
+
+impl Scheme for LoopbackInterface {
+    fn name(&self) -> &str {
+        "loopback"
+    }
+
+    fn handle_irq(&self, _cause: usize) {}
+}
+
+impl NetScheme for LoopbackInterface {
+    fn recv(&self, _buf: &mut [u8]) -> DeviceResult<usize> {
+        unimplemented!()
+    }
+    fn send(&self, _buf: &[u8]) -> DeviceResult<usize> {
+        unimplemented!()
+    }
+    fn poll(&self) -> DeviceResult {
+        let timestamp = Instant::from_millis(0);
+        let sockets = get_sockets();
+        let mut sockets = sockets.lock();
+        match self.iface.lock().poll(&mut sockets, timestamp) {
+            Ok(_) => Ok(()),
+            Err(err) => {
+                debug!("poll got err {}", err);
+                Err(DeviceError::IoError)
+            }
+        }
+    }
+
+    fn get_mac(&self) -> EthernetAddress {
+        unimplemented!()
+    }
+    fn get_ifname(&self) -> String {
+        unimplemented!()
+    }
+    fn get_ip_address(&self) -> Vec<IpCidr> {
+        unimplemented!()
+    }
+}
--- a/drivers/src/net/mod.rs
+++ b/drivers/src/net/mod.rs
@ -0,0 +1,83 @@
+//! LAN driver, only for Realtek currently.
+
+pub mod e1000;
+cfg_if::cfg_if! {
+    if #[cfg(target_arch = "riscv64")] {
+mod realtek;
+mod rtlx;
+
+pub use rtlx::*;
+    }
+}
+
+/*
+/// External functions that drivers must use
+pub trait Provider {
+    /// Page size (usually 4K)
+    const PAGE_SIZE: usize;
+
+    /// Allocate consequent physical memory for DMA.
+    /// Return (`virtual address`, `physical address`).
+    /// The address is page aligned.
+    fn alloc_dma(size: usize) -> (usize, usize);
+
+    /// Deallocate DMA
+    fn dealloc_dma(vaddr: usize, size: usize);
+}
+*/
+pub use isomorphic_drivers::provider::Provider;
+
+pub struct ProviderImpl;
+
+impl Provider for ProviderImpl {
+    const PAGE_SIZE: usize = PAGE_SIZE;
+
+    fn alloc_dma(size: usize) -> (usize, usize) {
+        let paddr = unsafe { drivers_dma_alloc(size / PAGE_SIZE) };
+        let vaddr = phys_to_virt(paddr);
+        (vaddr, paddr)
+    }
+
+    fn dealloc_dma(vaddr: usize, size: usize) {
+        let paddr = virt_to_phys(vaddr);
+        unsafe { drivers_dma_dealloc(paddr, size / PAGE_SIZE) };
+    }
+}
+
+pub fn phys_to_virt(paddr: PhysAddr) -> VirtAddr {
+    unsafe { drivers_phys_to_virt(paddr) }
+}
+
+pub fn virt_to_phys(vaddr: VirtAddr) -> PhysAddr {
+    unsafe { drivers_virt_to_phys(vaddr) }
+}
+
+extern "C" {
+    fn drivers_dma_alloc(pages: usize) -> PhysAddr;
+    fn drivers_dma_dealloc(paddr: PhysAddr, pages: usize) -> i32;
+    fn drivers_phys_to_virt(paddr: PhysAddr) -> VirtAddr;
+    fn drivers_virt_to_phys(vaddr: VirtAddr) -> PhysAddr;
+}
+
+pub const PAGE_SIZE: usize = 4096;
+
+type VirtAddr = usize;
+type PhysAddr = usize;
+
+pub mod loopback;
+pub use loopback::LoopbackInterface;
+
+use alloc::sync::Arc;
+use alloc::vec;
+use lock::Mutex;
+
+use smoltcp::socket::SocketSet;
+
+lazy_static::lazy_static! {
+    pub static ref SOCKETS: Arc<Mutex<SocketSet<'static>>> =
+    Arc::new(Mutex::new(SocketSet::new(vec![])));
+}
+
+pub fn get_sockets() -> Arc<Mutex<SocketSet<'static>>> {
+    SOCKETS.clone()
+}
--- a/drivers/src/net/realtek/mii.rs
+++ b/drivers/src/net/realtek/mii.rs
@ -0,0 +1,118 @@
+// From Linux
+
+/* Generic MII registers. */
+pub const MII_BMCR: u32 = 0x00;
+pub const MII_BMSR: u32 = 0x01;
+pub const MII_PHYSID1: u32 = 0x02;
+pub const MII_PHYSID2: u32 = 0x03;
+pub const MII_ADVERTISE: u32 = 0x04;
+pub const MII_LPA: u32 = 0x05;
+pub const MII_EXPANSION: u32 = 0x06;
+pub const MII_CTRL1000: u32 = 0x09;
+pub const MII_STAT1000: u32 = 0x0a;
+pub const MII_MMD_CTRL: u32 = 0x0d;
+pub const MII_MMD_DATA: u32 = 0x0e;
+pub const MII_ESTATUS: u32 = 0x0f;
+pub const MII_DCOUNTER: u32 = 0x12;
+pub const MII_FCSCOUNTER: u32 = 0x13;
+pub const MII_NWAYTEST: u32 = 0x14;
+pub const MII_RERRCOUNTER: u32 = 0x15;
+pub const MII_SREVISION: u32 = 0x16;
+pub const MII_RESV1: u32 = 0x17;
+pub const MII_LBRERROR: u32 = 0x18;
+pub const MII_PHYADDR: u32 = 0x19;
+pub const MII_RESV2: u32 = 0x1a;
+pub const MII_TPISTATUS: u32 = 0x1b;
+pub const MII_NCONFIG: u32 = 0x1c;
+
+/* Basic mode control register. */
+pub const BMCR_RESV: u32 = 0x003f;
+pub const BMCR_SPEED1000: u32 = 0x0040;
+pub const BMCR_CTST: u32 = 0x0080;
+pub const BMCR_FULLDPLX: u32 = 0x0100;
+pub const BMCR_ANRESTART: u32 = 0x0200;
+pub const BMCR_ISOLATE: u32 = 0x0400;
+pub const BMCR_PDOWN: u32 = 0x0800;
+pub const BMCR_ANENABLE: u32 = 0x1000;
+pub const BMCR_SPEED100: u32 = 0x2000;
+pub const BMCR_LOOPBACK: u32 = 0x4000;
+pub const BMCR_RESET: u32 = 0x8000;
+pub const BMCR_SPEED10: u32 = 0x0000;
+
+/* Basic mode status register. */
+pub const BMSR_ERCAP: u32 = 0x0001;
+pub const BMSR_JCD: u32 = 0x0002;
+pub const BMSR_LSTATUS: u32 = 0x0004;
+pub const BMSR_ANEGCAPABLE: u32 = 0x0008;
+pub const BMSR_RFAULT: u32 = 0x0010;
+pub const BMSR_ANEGCOMPLETE: u32 = 0x0020;
+pub const BMSR_RESV: u32 = 0x00c0;
+pub const BMSR_ESTATEN: u32 = 0x0100;
+pub const BMSR_100HALF2: u32 = 0x0200;
+pub const BMSR_100FULL2: u32 = 0x0400;
+pub const BMSR_10HALF: u32 = 0x0800;
+pub const BMSR_10FULL: u32 = 0x1000;
+pub const BMSR_100HALF: u32 = 0x2000;
+pub const BMSR_100FULL: u32 = 0x4000;
+pub const BMSR_100BASE4: u32 = 0x8000;
+
+/* Advertisement control register. */
+pub const ADVERTISE_SLCT: u32 = 0x001f;
+pub const ADVERTISE_CSMA: u32 = 0x0001;
+pub const ADVERTISE_10HALF: u32 = 0x0020;
+pub const ADVERTISE_1000XFULL: u32 = 0x0020;
+pub const ADVERTISE_10FULL: u32 = 0x0040;
+pub const ADVERTISE_1000XHALF: u32 = 0x0040;
+pub const ADVERTISE_100HALF: u32 = 0x0080;
+pub const ADVERTISE_1000XPAUSE: u32 = 0x0080;
+pub const ADVERTISE_100FULL: u32 = 0x0100;
+pub const ADVERTISE_1000XPSE_ASYM: u32 = 0x0100;
+pub const ADVERTISE_100BASE4: u32 = 0x0200;
+pub const ADVERTISE_PAUSE_CAP: u32 = 0x0400;
+pub const ADVERTISE_PAUSE_ASYM: u32 = 0x0800;
+pub const ADVERTISE_RESV: u32 = 0x1000;
+pub const ADVERTISE_RFAULT: u32 = 0x2000;
+pub const ADVERTISE_LPACK: u32 = 0x4000;
+pub const ADVERTISE_NPAGE: u32 = 0x8000;
+
+pub const ADVERTISE_FULL: u32 = ADVERTISE_100FULL | ADVERTISE_10FULL | ADVERTISE_CSMA;
+pub const ADVERTISE_ALL: u32 =
+    ADVERTISE_10HALF | ADVERTISE_10FULL | ADVERTISE_100HALF | ADVERTISE_100FULL;
+
+/* Link partner ability register. */
+pub const LPA_SLCT: u32 = 0x001f;
+pub const LPA_10HALF: u32 = 0x0020;
+pub const LPA_1000XFULL: u32 = 0x0020;
+pub const LPA_10FULL: u32 = 0x0040;
+pub const LPA_1000XHALF: u32 = 0x0040;
+pub const LPA_100HALF: u32 = 0x0080;
+pub const LPA_1000XPAUSE: u32 = 0x0080;
+pub const LPA_100FULL: u32 = 0x0100;
+pub const LPA_1000XPAUSE_ASYM: u32 = 0x0100;
+pub const LPA_100BASE4: u32 = 0x0200;
+pub const LPA_PAUSE_CAP: u32 = 0x0400;
+pub const LPA_PAUSE_ASYM: u32 = 0x0800;
+pub const LPA_RESV: u32 = 0x1000;
+pub const LPA_RFAULT: u32 = 0x2000;
+pub const LPA_LPACK: u32 = 0x4000;
+pub const LPA_NPAGE: u32 = 0x8000;
+
+pub const LPA_DUPLEX: u32 = (LPA_10FULL | LPA_100FULL);
+pub const LPA_100: u32 = (LPA_100FULL | LPA_100HALF | LPA_100BASE4);
+
+/* 1000BASE-T Control register */
+pub const ADVERTISE_1000FULL: u32 = 0x0200;
+pub const ADVERTISE_1000HALF: u32 = 0x0100;
+pub const CTL1000_AS_MASTER: u32 = 0x0800;
+pub const CTL1000_ENABLE_MASTER: u32 = 0x1000;
+
+/* 1000BASE-T Status register */
+pub const LPA_1000MSFAIL: u32 = 0x8000;
+pub const LPA_1000LOCALRXOK: u32 = 0x2000;
+pub const LPA_1000REMRXOK: u32 = 0x1000;
+pub const LPA_1000FULL: u32 = 0x0800;
+pub const LPA_1000HALF: u32 = 0x0400;
+
+/* Flow control flags */
+pub const FLOW_CTRL_TX: u32 = 0x01;
+pub const FLOW_CTRL_RX: u32 = 0x02;
--- a/drivers/src/net/realtek/mod.rs
+++ b/drivers/src/net/realtek/mod.rs
@ -0,0 +1,28 @@
+#![allow(unused)]
+#![allow(non_camel_case_types)]
+
+use super::Provider;
+use super::{phys_to_virt, virt_to_phys};
+
+#[macro_use]
+mod log {
+    macro_rules! trace {
+        ($($arg:expr),*) => { $( let _ = $arg; )* };
+    }
+    macro_rules! debug {
+        ($($arg:expr),*) => { $( let _ = $arg; )* };
+    }
+    macro_rules! info {
+        ($($arg:expr),*) => { $( let _ = $arg; )*};
+    }
+    macro_rules! warn {
+        ($($arg:expr),*) => { $( let _ = $arg; )*};
+    }
+    macro_rules! error {
+        ($($arg:expr),*) => { $( let _ = $arg; )* };
+    }
+}
+
+pub mod mii;
+pub mod rtl8211f;
+mod utils;
--- a/drivers/src/net/realtek/rtl8211f.rs
+++ b/drivers/src/net/realtek/rtl8211f.rs
--- a/drivers/src/net/realtek/utils.rs
+++ b/drivers/src/net/realtek/utils.rs
@ -0,0 +1,91 @@
+// c906
+use core::arch::asm;
+
+const FREQUENCY: u64 = 24_000_000; // C906: 24_000_000, Qemu: 10_000_000
+const MMIO_MTIMECMP0: *mut u64 = 0x0200_4000usize as *mut u64;
+const MMIO_MTIME: *const u64 = 0x0200_BFF8 as *const u64;
+
+const L1_CACHE_BYTES: u64 = 64;
+const CACHE_LINE_SIZE: u64 = 64;
+
+pub fn flush_cache(addr: u64, size: u64) {
+    flush_dcache_range(addr, addr + size);
+}
+
+pub fn invalidate_dcache(addr: u64, size: u64) {
+    invalidate_dcache_range(addr, addr + size);
+}
+
+// 注意start输入物理地址
+pub fn flush_dcache_range(start: u64, end: u64) {
+    // CACHE_LINE 64对齐
+    let end = (end + (CACHE_LINE_SIZE - 1)) & !(CACHE_LINE_SIZE - 1);
+
+    // 地址对齐到L1 Cache的节
+    let mut i: u64 = start & !(L1_CACHE_BYTES - 1);
+    while i < end {
+        unsafe {
+            // 老风格的llvm asm
+            // DCACHE 指定物理地址清脏表项
+            // llvm_asm!("dcache.cpa $0"::"r"(i));
+
+            // 新asm
+            asm!(".long 0x0295000b", in("a0") i); // dcache.cpa a0, 因编译器无法识别该指令
+        }
+
+        i += L1_CACHE_BYTES;
+    }
+
+    unsafe {
+        //llvm_asm!("sync.is");
+
+        asm!(".long 0x01b0000b"); // sync.is
+    }
+}
+
+// start 物理地址
+pub fn invalidate_dcache_range(start: u64, end: u64) {
+    let end = (end + (CACHE_LINE_SIZE - 1)) & !(CACHE_LINE_SIZE - 1);
+    let mut i: u64 = start & !(L1_CACHE_BYTES - 1);
+    while i < end {
+        unsafe {
+            //llvm_asm!("dcache.ipa $0"::"r"(i)); // DCACHE 指定物理地址无效表项
+            asm!(".long 0x02a5000b", in("a0") i); // dcache.ipa a0
+        }
+
+        i += L1_CACHE_BYTES;
+    }
+
+    unsafe {
+        //llvm_asm!("sync.is");
+        asm!(".long 0x01b0000b"); // sync.is
+    }
+}
+
+pub fn fence_w() {
+    unsafe {
+        //llvm_asm!("fence ow, ow" ::: "memory");
+        asm!("fence ow, ow");
+    }
+}
+
+pub fn get_cycle() -> u64 {
+    unsafe { MMIO_MTIME.read_volatile() }
+}
+
+// Timer, Freq = 24000000Hz
+// TIMER_CLOCK = (24 * 1000 * 1000)
+// 微秒(us)
+pub fn usdelay(us: u64) {
+    let mut t1: u64 = get_cycle();
+    let t2 = t1 + us * 24;
+
+    while t2 >= t1 {
+        t1 = get_cycle();
+    }
+}
+
+// 毫秒(ms)
+pub fn msdelay(ms: u64) {
+    usdelay(ms * 1000);
+}
--- a/drivers/src/net/rtlx.rs
+++ b/drivers/src/net/rtlx.rs
@ -0,0 +1,224 @@
+use alloc::collections::BTreeMap;
+use alloc::string::String;
+use alloc::sync::Arc;
+// use alloc::vec;
+use alloc::vec::Vec;
+use lock::Mutex;
+
+use smoltcp::iface::*;
+use smoltcp::phy::{self, Device, DeviceCapabilities, Medium};
+// use smoltcp::socket::SocketSet;
+use smoltcp::time::Instant;
+use smoltcp::wire::*;
+use smoltcp::Result;
+
+use super::realtek::rtl8211f;
+use super::realtek::rtl8211f::RTL8211F;
+use super::ProviderImpl;
+use super::PAGE_SIZE;
+//use kernel_hal::drivers::{Driver, DeviceType, NetDriver, DRIVERS, NET_DRIVERS, SOCKETS};
+
+use crate::net::get_sockets;
+use crate::scheme::{NetScheme, Scheme};
+use crate::{DeviceError, DeviceResult};
+
+#[derive(Clone)]
+pub struct RTLxDriver(Arc<Mutex<RTL8211F<ProviderImpl>>>);
+
+#[derive(Clone)]
+pub struct RTLxInterface {
+    pub iface: Arc<Mutex<Interface<'static, RTLxDriver>>>,
+    pub driver: RTLxDriver,
+    pub name: String,
+    pub irq: usize,
+}
+
+impl Scheme for RTLxInterface {
+    fn name(&self) -> &str {
+        "rtl8211f"
+    }
+
+    fn handle_irq(&self, irq: usize) {
+        if irq != self.irq {
+            // not ours, skip it
+            return;
+        }
+
+        let status = self.driver.0.lock().interrupt_status();
+
+        let handle_tx_rx = 3;
+        if status == handle_tx_rx {
+            let timestamp = Instant::from_millis(0);
+            let sockets = get_sockets();
+            let mut sockets = sockets.lock();
+
+            self.driver.0.lock().int_disable();
+            match self.iface.lock().poll(&mut sockets, timestamp) {
+                Ok(b) => {
+                    debug!("nic poll, is changed ?: {}", b);
+                }
+                Err(err) => {
+                    error!("poll got err {}", err);
+                }
+            }
+            self.driver.0.lock().int_enable();
+            //return true;
+        }
+    }
+}
+
+impl NetScheme for RTLxInterface {
+    fn get_mac(&self) -> EthernetAddress {
+        self.iface.lock().ethernet_addr()
+    }
+
+    fn get_ifname(&self) -> String {
+        self.name.clone()
+    }
+
+    fn get_ip_address(&self) -> Vec<IpCidr> {
+        Vec::from(self.iface.lock().ip_addrs())
+    }
+
+    fn poll(&self) -> DeviceResult {
+        let timestamp = Instant::from_millis(0);
+        let sockets = get_sockets();
+        let mut sockets = sockets.lock();
+        match self.iface.lock().poll(&mut sockets, timestamp) {
+            Ok(b) => {
+                debug!("nic poll, is changed ?: {}", b);
+                Ok(())
+            }
+            Err(err) => {
+                error!("poll got err {}", err);
+                Err(DeviceError::IoError)
+            }
+        }
+    }
+
+    fn recv(&self, buf: &mut [u8]) -> DeviceResult<usize> {
+        if self.driver.0.lock().can_recv() {
+            let (vec_recv, rxcount) = self.driver.0.lock().geth_recv(1);
+            buf.copy_from_slice(&vec_recv);
+            Ok(rxcount as usize)
+        } else {
+            Err(DeviceError::NotReady)
+        }
+    }
+
+    fn send(&self, data: &[u8]) -> DeviceResult<usize> {
+        if self.driver.0.lock().can_send() {
+            self.driver.0.lock().geth_send(data).unwrap();
+            Ok(data.len())
+        } else {
+            Err(DeviceError::NotReady)
+        }
+    }
+}
+
+pub struct RTLxRxToken(Vec<u8>);
+pub struct RTLxTxToken(RTLxDriver);
+
+impl<'a> Device<'a> for RTLxDriver {
+    type RxToken = RTLxRxToken;
+    type TxToken = RTLxTxToken;
+
+    fn capabilities(&self) -> DeviceCapabilities {
+        let mut caps = DeviceCapabilities::default();
+        caps.max_transmission_unit = 1536;
+        caps.max_burst_size = Some(64);
+        caps.medium = Medium::Ethernet;
+        caps
+    }
+
+    fn receive(&mut self) -> Option<(Self::RxToken, Self::TxToken)> {
+        if self.0.lock().can_recv() {
+            //这里每次只接收一个网络包
+            let (vec_recv, _rxcount) = self.0.lock().geth_recv(1);
+            Some((RTLxRxToken(vec_recv), RTLxTxToken(self.clone())))
+        } else {
+            None
+        }
+    }
+
+    fn transmit(&mut self) -> Option<Self::TxToken> {
+        if self.0.lock().can_send() {
+            Some(RTLxTxToken(self.clone()))
+        } else {
+            None
+        }
+    }
+}
+
+impl phy::RxToken for RTLxRxToken {
+    fn consume<R, F>(mut self, _timestamp: Instant, f: F) -> Result<R>
+    where
+        F: FnOnce(&mut [u8]) -> Result<R>,
+    {
+        f(&mut self.0)
+    }
+}
+
+impl phy::TxToken for RTLxTxToken {
+    fn consume<R, F>(self, _timestamp: Instant, len: usize, f: F) -> Result<R>
+    where
+        F: FnOnce(&mut [u8]) -> Result<R>,
+    {
+        let mut buffer = [0u8; 1536];
+        let result = f(&mut buffer[..len]);
+        if result.is_ok() {
+            (self.0).0.lock().geth_send(&buffer[..len]).unwrap();
+        }
+        result
+    }
+}
+
+pub fn rtlx_init<F: Fn(usize, usize) -> Option<usize>>(
+    irq: usize,
+    mapper: F,
+) -> DeviceResult<RTLxInterface> {
+    mapper(rtl8211f::PINCTRL_GPIO_BASE as usize, PAGE_SIZE * 2);
+    mapper(rtl8211f::SYS_CFG_BASE as usize, PAGE_SIZE * 2);
+
+    let mut rtl8211f = RTL8211F::<ProviderImpl>::new(&[0u8; 6]);
+    let mac = rtl8211f.get_umac();
+    //启动前请为D1插上网线
+    warn!("Please plug in the Ethernet cable");
+
+    rtl8211f.open().unwrap();
+    rtl8211f.set_rx_mode();
+    rtl8211f.adjust_link().unwrap();
+
+    let net_driver = RTLxDriver(Arc::new(Mutex::new(rtl8211f)));
+
+    let ethernet_addr = EthernetAddress::from_bytes(&mac);
+    let ip_addrs = [IpCidr::new(IpAddress::v4(192, 168, 0, 123), 24)];
+    let default_gateway = Ipv4Address::new(192, 168, 0, 1);
+    static mut ROUTES_STORAGE: [Option<(IpCidr, Route)>; 1] = [None; 1];
+    let mut routes = unsafe { Routes::new(&mut ROUTES_STORAGE[..]) };
+    routes.add_default_ipv4_route(default_gateway).unwrap();
+    let neighbor_cache = NeighborCache::new(BTreeMap::new());
+    let iface = InterfaceBuilder::new(net_driver.clone())
+        .ethernet_addr(ethernet_addr)
+        .neighbor_cache(neighbor_cache)
+        .ip_addrs(ip_addrs)
+        .routes(routes)
+        .finalize();
+
+    info!("rtl8211f interface up with addr 192.168.0.123/24");
+    info!("rtl8211f interface up with route 192.168.0.1/24");
+    let rtl8211f_iface = RTLxInterface {
+        iface: Arc::new(Mutex::new(iface)),
+        driver: net_driver,
+        name: String::from("rtl8211f"),
+        irq,
+    };
+
+    Ok(rtl8211f_iface)
+}
+
+//TODO: Global SocketSet
+// lazy_static::lazy_static! {
+//     pub static ref SOCKETS: Mutex<SocketSet<'static>> =
+//         Mutex::new(SocketSet::new(vec![]));
+// }
--- a/drivers/src/prelude.rs
+++ b/drivers/src/prelude.rs
@ -0,0 +1,11 @@
+//! Re-export most commonly used driver types.
+
+pub use crate::scheme::display::{ColorFormat, DisplayInfo, FrameBuffer, Rectangle, RgbColor};
+pub use crate::scheme::input::{CapabilityType, InputCapability, InputEvent, InputEventType};
+pub use crate::scheme::irq::{IrqHandler, IrqPolarity, IrqTriggerMode};
+pub use crate::{Device, DeviceError, DeviceResult};
+
+/// Re-export types from [`input`](crate::input).
+pub mod input {
+    pub use crate::input::{Mouse, MouseFlags, MouseState};
+}
--- a/drivers/src/scheme/block.rs
+++ b/drivers/src/scheme/block.rs
@ -0,0 +1,8 @@
+use super::Scheme;
+use crate::DeviceResult;
+
+pub trait BlockScheme: Scheme {
+    fn read_block(&self, block_id: usize, buf: &mut [u8]) -> DeviceResult;
+    fn write_block(&self, block_id: usize, buf: &[u8]) -> DeviceResult;
+    fn flush(&self) -> DeviceResult;
+}
--- a/drivers/src/scheme/display.rs
+++ b/drivers/src/scheme/display.rs
@ -0,0 +1,218 @@
+use super::Scheme;
+use crate::DeviceResult;
+
+#[repr(transparent)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct RgbColor(u32);
+
+/// Color format for one pixel. `RGB888` means R in bits 16-23, G in bits 8-15 and B in bits 0-7.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum ColorFormat {
+    RGB332,
+    RGB565,
+    RGB888,
+    ARGB8888,
+}
+
+#[derive(Debug)]
+pub struct Rectangle {
+    pub x: u32,
+    pub y: u32,
+    pub width: u32,
+    pub height: u32,
+}
+
+pub struct FrameBuffer<'a> {
+    raw: &'a mut [u8],
+}
+
+#[derive(Debug, Clone, Copy)]
+pub struct DisplayInfo {
+    /// visible width
+    pub width: u32,
+    /// visible height
+    pub height: u32,
+    /// color encoding format of RGBA
+    pub format: ColorFormat,
+    /// frame buffer base virtual address
+    pub fb_base_vaddr: usize,
+    /// frame buffer size
+    pub fb_size: usize,
+}
+
+impl RgbColor {
+    #[inline]
+    pub const fn new(r: u8, g: u8, b: u8) -> Self {
+        Self(((r as u32) << 16) | ((g as u32) << 8) | b as u32)
+    }
+
+    #[inline]
+    pub const fn r(self) -> u8 {
+        (self.0 >> 16) as u8
+    }
+
+    #[inline]
+    pub const fn g(self) -> u8 {
+        (self.0 >> 8) as u8
+    }
+
+    #[inline]
+    pub const fn b(self) -> u8 {
+        self.0 as u8
+    }
+
+    #[inline]
+    pub const fn raw_value(self) -> u32 {
+        self.0
+    }
+}
+
+impl ColorFormat {
+    /// Number of bits per pixel.
+    #[inline]
+    pub const fn depth(self) -> u8 {
+        match self {
+            Self::RGB332 => 8,
+            Self::RGB565 => 16,
+            Self::RGB888 => 24,
+            Self::ARGB8888 => 32,
+        }
+    }
+
+    /// Number of bytes per pixel.
+    #[inline]
+    pub const fn bytes(self) -> u8 {
+        self.depth() / 8
+    }
+}
+
+impl<'a> FrameBuffer<'a> {
+    /// # Safety
+    ///
+    /// This function is unsafe because it created the `FrameBuffer` structure
+    /// from the raw pointer.
+    pub unsafe fn from_raw_parts_mut(ptr: *mut u8, len: usize) -> Self {
+        Self {
+            raw: core::slice::from_raw_parts_mut(ptr, len),
+        }
+    }
+
+    pub fn from_slice(slice: &'a mut [u8]) -> Self {
+        Self { raw: slice }
+    }
+
+    /// # Safety
+    ///
+    /// This function is unsafe because the caller must ensure `offset` does
+    /// not exceed the frame buffer size.
+    pub unsafe fn write_color(&mut self, offset: usize, color: RgbColor, format: ColorFormat) {
+        const fn pack_channel(
+            r_val: u8,
+            _r_bits: u8,
+            g_val: u8,
+            g_bits: u8,
+            b_val: u8,
+            b_bits: u8,
+        ) -> u32 {
+            ((r_val as u32) << (g_bits + b_bits)) | ((g_val as u32) << b_bits) | b_val as u32
+        }
+
+        let (r, g, b) = (color.r(), color.g(), color.b());
+        let ptr = self.raw.as_mut_ptr().add(offset);
+        let dst = core::slice::from_raw_parts_mut(ptr, 4);
+        match format {
+            ColorFormat::RGB332 => {
+                *ptr = pack_channel(r >> (8 - 3), 3, g >> (8 - 3), 3, b >> (8 - 2), 2) as u8
+            }
+            ColorFormat::RGB565 => {
+                *(ptr as *mut u16) =
+                    pack_channel(r >> (8 - 5), 5, g >> (8 - 6), 6, b >> (8 - 5), 5) as u16
+            }
+            ColorFormat::RGB888 => {
+                dst[2] = r;
+                dst[1] = g;
+                dst[0] = b;
+            }
+            ColorFormat::ARGB8888 => *(ptr as *mut u32) = color.raw_value(),
+        }
+    }
+}
+
+impl<'a> core::ops::Deref for FrameBuffer<'a> {
+    type Target = [u8];
+    fn deref(&self) -> &Self::Target {
+        self.raw
+    }
+}
+
+impl<'a> core::ops::DerefMut for FrameBuffer<'a> {
+    #[allow(clippy::needless_borrow)]
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.raw
+    }
+}
+
+impl DisplayInfo {
+    /// Number of bytes between each row of the frame buffer.
+    #[inline]
+    pub const fn pitch(self) -> u32 {
+        self.width * self.format.bytes() as u32
+    }
+}
+
+pub trait DisplayScheme: Scheme {
+    fn info(&self) -> DisplayInfo;
+
+    /// Returns the framebuffer.
+    fn fb(&self) -> FrameBuffer;
+
+    /// Write pixel color.
+    #[inline]
+    fn draw_pixel(&self, x: u32, y: u32, color: RgbColor) {
+        let info = self.info();
+        let offset = (x + y * info.width) as usize * info.format.bytes() as usize;
+        if offset < info.fb_size {
+            unsafe { self.fb().write_color(offset, color, info.format) };
+        }
+    }
+
+    /// Fill a given rectangle with `color`.
+    fn fill_rect(&self, rect: &Rectangle, color: RgbColor) {
+        let info = self.info();
+        let left = rect.x.min(info.width);
+        let right = (left + rect.width).min(info.width);
+        let top = rect.y.min(info.height);
+        let bottom = (top + rect.height).min(info.height);
+        for j in top..bottom {
+            for i in left..right {
+                self.draw_pixel(i, j, color);
+            }
+        }
+    }
+
+    /// Clear the screen with `color`.
+    fn clear(&self, color: RgbColor) {
+        let info = self.info();
+        self.fill_rect(
+            &Rectangle {
+                x: 0,
+                y: 0,
+                width: info.width,
+                height: info.height,
+            },
+            color,
+        )
+    }
+
+    /// Whether need to flush the frambuffer to screen.
+    #[inline]
+    fn need_flush(&self) -> bool {
+        false
+    }
+
+    /// Flush framebuffer to screen.
+    #[inline]
+    fn flush(&self) -> DeviceResult {
+        Ok(())
+    }
+}
--- a/drivers/src/scheme/event.rs
+++ b/drivers/src/scheme/event.rs
@ -0,0 +1,62 @@
+use crate::utils::EventHandler;
+
+pub trait EventScheme {
+    type Event;
+
+    /// Trigger the event manually and call its handler immediately.
+    fn trigger(&self, event: Self::Event);
+
+    /// Subscribe events, call the `handler` when an input event occurs.
+    /// If `once` is ture, unsubscribe automatically after handling.
+    fn subscribe(&self, handler: EventHandler<Self::Event>, once: bool);
+}
+
+macro_rules! impl_event_scheme {
+    ($struct:ident $(, $event_ty:ty)?) => {
+        impl_event_scheme!(@impl_base $struct $(, $event_ty)?);
+    };
+    ($struct:ident<'_> $(, $event_ty:ty)?) => {
+        impl_event_scheme!(@impl_base $struct<'_> $(, $event_ty)?);
+    };
+    ($struct:ident < $($types:ident),* > $(where $($preds:tt)+)? $(, $event_ty:ty)?) => {
+        impl_event_scheme!(@impl_base $struct < $($types),* > $(where $($preds)+)? $(, $event_ty)?);
+    };
+
+    (@impl_base $struct:ident $(, $event_ty:ty)?) => {
+        impl $crate::scheme::EventScheme for $struct {
+            impl_event_scheme!(@impl_body $(, $event_ty)?);
+        }
+    };
+    (@impl_base $struct:ident<'_> $(, $event_ty:ty)?) => {
+        impl $crate::scheme::EventScheme for $struct<'_> {
+            impl_event_scheme!(@impl_body $(, $event_ty)?);
+        }
+    };
+    (@impl_base $struct:ident < $($types:ident),* > $(where $($preds:tt)+)? $(, $event_ty:ty)?) => {
+        impl < $($types),* > $crate::scheme::EventScheme for $struct < $($types),* >
+            $(where $($preds)+)?
+        {
+            impl_event_scheme!(@impl_body $(, $event_ty)?);
+        }
+    };
+
+    (@impl_assoc_type) => {
+        type Event = ();
+    };
+    (@impl_assoc_type, $event_ty:ty) => {
+        type Event = $event_ty;
+    };
+    (@impl_body $(, $event_ty:ty)?) => {
+        impl_event_scheme!(@impl_assoc_type $(, $event_ty)?);
+
+        #[inline]
+        fn trigger(&self, event: Self::Event) {
+            self.listener.trigger(event);
+        }
+
+        #[inline]
+        fn subscribe(&self, handler: $crate::utils::EventHandler<Self::Event>, once: bool) {
+            self.listener.subscribe(handler, once);
+        }
+    };
+}
--- a/drivers/src/scheme/input.rs
+++ b/drivers/src/scheme/input.rs
@ -0,0 +1,131 @@
+use core::fmt;
+
+use super::{event::EventScheme, Scheme};
+use crate::input::input_event_codes::ev::*;
+
+numeric_enum_macro::numeric_enum! {
+    #[repr(u16)]
+    #[derive(Clone, Copy, Debug)]
+    /// Linux input event codes.
+    ///
+    /// Reference: <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/input-event-codes.h>
+    pub enum InputEventType {
+        /// Used as markers to separate events. Events may be separated in time or in space,
+        /// such as with the multitouch protocol.
+        Syn = EV_SYN,
+        /// Used to describe state changes of keyboards, buttons, or other key-like devices.
+        Key = EV_KEY,
+        /// Used to describe relative axis value changes, e.g. moving the mouse 5 units
+        /// to the left.
+        RelAxis = EV_REL,
+        /// Used to describe absolute axis value changes, e.g. describing the coordinates
+        /// of a touch on a touchscreen.
+        AbsAxis = EV_ABS,
+        /// Used to describe miscellaneous input data that do not fit into other types.
+        Misc = EV_MSC,
+        /// Used to describe binary state input switches.
+        Switch = EV_SW,
+        /// Used to turn LEDs on devices on and off.
+        Led = EV_LED,
+        /// Used to output sound to devices.
+        Sound = EV_SND,
+        /// Used for autorepeating devices.
+        Repeat = EV_REP,
+        /// Used to send force feedback commands to an input device.
+        FeedBack = EV_FF,
+        /// A special type for power button and switch input.
+        Power = EV_PWR,
+        /// Used to receive force feedback device status.
+        FeedBackStatus = EV_FF_STATUS,
+    }
+}
+
+#[derive(Clone, Copy, Debug)]
+pub struct InputEvent {
+    pub event_type: InputEventType,
+    pub code: u16,
+    pub value: i32,
+}
+
+#[repr(u16)]
+#[derive(Clone, Copy, Debug)]
+pub enum CapabilityType {
+    Key = EV_KEY,
+    RelAxis = EV_REL,
+    AbsAxis = EV_ABS,
+    Misc = EV_MSC,
+    Switch = EV_SW,
+    Led = EV_LED,
+    Sound = EV_SND,
+    FeedBack = EV_FF,
+    Event,
+    InputProp,
+}
+
+pub struct InputCapability {
+    /// bitmap to support up to 1024 bits.
+    bitmap: [u64; 16],
+}
+
+impl InputCapability {
+    pub fn empty() -> Self {
+        Self { bitmap: [0; 16] }
+    }
+
+    pub fn from_bitmap(bitmap: &[u8]) -> Self {
+        let mut cap = Self::empty();
+        let bitcount = bitmap.len() as u16 * 8;
+        for i in 0..bitcount as usize {
+            if bitmap[i / 8] & (1 << (i % 64)) != 0 {
+                cap.set(i as u16);
+            }
+        }
+        cap
+    }
+
+    pub fn set(&mut self, code: u16) {
+        self.bitmap[code as usize / 64] |= 1 << (code % 64);
+    }
+
+    pub fn set_all(&mut self, codes: &[u16]) {
+        for &c in codes {
+            self.set(c);
+        }
+    }
+
+    pub fn contains(&self, code: u16) -> bool {
+        self.bitmap[code as usize / 64] & (1 << (code % 64)) != 0
+    }
+
+    pub fn contains_all(&self, codes: &[u16]) -> bool {
+        for &c in codes {
+            if !self.contains(c) {
+                return false;
+            }
+        }
+        true
+    }
+}
+
+impl fmt::Debug for InputCapability {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let mut skip_empty = true;
+        write!(f, "[")?;
+        for i in (0..16).rev() {
+            if self.bitmap[i] > 0 || !skip_empty {
+                write!(f, "{:#016x}", self.bitmap[i])?;
+                if i > 0 {
+                    write!(f, ", ")?;
+                }
+                skip_empty = false;
+            }
+        }
+        write!(f, "]")?;
+        Ok(())
+    }
+}
+
+pub trait InputScheme: Scheme + EventScheme<Event = InputEvent> {
+    /// Returns the capability bitmap of the specific kind of event.
+    fn capability(&self, cap_type: CapabilityType) -> InputCapability;
+}
--- a/drivers/src/scheme/irq.rs
+++ b/drivers/src/scheme/irq.rs
@ -0,0 +1,84 @@
+use alloc::boxed::Box;
+use alloc::sync::Arc;
+use core::ops::Range;
+
+use super::Scheme;
+use crate::DeviceResult;
+
+/// A type alias for
+pub type IrqHandler = Box<dyn Fn() + Send + Sync>;
+
+#[derive(Debug)]
+pub enum IrqTriggerMode {
+    Edge,
+    Level,
+}
+
+#[derive(Debug)]
+pub enum IrqPolarity {
+    ActiveHigh,
+    ActiveLow,
+}
+
+pub trait IrqScheme: Scheme {
+    /// Is a valid IRQ number.
+    fn is_valid_irq(&self, irq_num: usize) -> bool;
+
+    /// Disable IRQ.
+    fn mask(&self, irq_num: usize) -> DeviceResult;
+
+    /// Enable IRQ.
+    fn unmask(&self, irq_num: usize) -> DeviceResult;
+
+    /// Configure the specified interrupt vector. If it is invoked, it must be
+    /// invoked prior to interrupt registration.
+    fn configure(&self, _irq_num: usize, _tm: IrqTriggerMode, _pol: IrqPolarity) -> DeviceResult {
+        unimplemented!()
+    }
+
+    /// Add an interrupt handler to an IRQ.
+    fn register_handler(&self, irq_num: usize, handler: IrqHandler) -> DeviceResult;
+
+    /// Register the device to delivery an IRQ.
+    fn register_device(&self, irq_num: usize, dev: Arc<dyn Scheme>) -> DeviceResult {
+        self.register_handler(irq_num, Box::new(move || dev.handle_irq(irq_num)))
+    }
+
+    /// Remove the interrupt handler to an IRQ.
+    fn unregister(&self, irq_num: usize) -> DeviceResult;
+
+    /// Method used for platform allocation of blocks of MSI and MSI-X compatible
+    /// IRQ targets.
+    fn msi_alloc_block(&self, _requested_irqs: usize) -> DeviceResult<Range<usize>> {
+        unimplemented!()
+    }
+
+    /// Method used to free a block of MSI IRQs previously allocated by msi_alloc_block().
+    /// This does not unregister IRQ handlers.
+    fn msi_free_block(&self, _block: Range<usize>) -> DeviceResult {
+        unimplemented!()
+    }
+
+    /// Register a handler function for a given msi_id within an msi_block_t. Passing a
+    /// NULL handler will effectively unregister a handler for a given msi_id within the
+    /// block.
+    fn msi_register_handler(
+        &self,
+        _block: Range<usize>,
+        _msi_id: usize,
+        _handler: IrqHandler,
+    ) -> DeviceResult {
+        unimplemented!()
+    }
+
+    /// Init irq for current cpu.
+    /// Some IRQ hardware requires per-CPU initialization.
+    fn init_hart(&self) {
+        unimplemented!()
+    }
+
+    /// [for x86_64] enable apic timer
+    fn apic_timer_enable(&self) {
+        unimplemented!()
+    }
+}
--- a/drivers/src/scheme/mod.rs
+++ b/drivers/src/scheme/mod.rs
@ -0,0 +1,55 @@
+//! The [`Scheme`] describe some functions must be implemented for different type of devices,
+//! there are many [`Scheme`] traits in this mod.
+//!
+//! If you need to develop a new device, just implement the corresponding trait.
+//!
+//! The [`Scheme`] trait is suitable for any architecture.
+
+pub(super) mod block;
+pub(super) mod display;
+pub(super) mod input;
+pub(super) mod irq;
+pub(super) mod net;
+pub(super) mod uart;
+
+#[macro_use]
+pub(super) mod event;
+pub(super) use impl_event_scheme;
+
+use alloc::sync::Arc;
+
+pub use block::BlockScheme;
+pub use display::DisplayScheme;
+pub use event::EventScheme;
+pub use input::InputScheme;
+pub use irq::IrqScheme;
+pub use net::NetScheme;
+pub use uart::UartScheme;
+
+/// Common of all device drivers.
+///
+/// Every device must says its name and handles interrupts.
+pub trait Scheme: SchemeUpcast + Send + Sync {
+    /// Returns name of the driver.
+    fn name(&self) -> &str;
+
+    /// Handles an interrupt.
+    fn handle_irq(&self, _irq_num: usize) {}
+}
+
+/// Used to convert a concrete type pointer to a general [`Scheme`] pointer.
+pub trait SchemeUpcast {
+    /// Performs the conversion.
+    fn upcast<'a>(self: Arc<Self>) -> Arc<dyn Scheme + 'a>
+    where
+        Self: 'a;
+}
+
+impl<T: Scheme + Sized> SchemeUpcast for T {
+    fn upcast<'a>(self: Arc<Self>) -> Arc<dyn Scheme + 'a>
+    where
+        Self: 'a,
+    {
+        self
+    }
+}
--- a/drivers/src/scheme/net.rs
+++ b/drivers/src/scheme/net.rs
@ -0,0 +1,14 @@
+use super::Scheme;
+use crate::DeviceResult;
+use alloc::string::String;
+use alloc::vec::Vec;
+use smoltcp::wire::{EthernetAddress, IpCidr};
+
+pub trait NetScheme: Scheme {
+    fn recv(&self, buf: &mut [u8]) -> DeviceResult<usize>;
+    fn send(&self, buf: &[u8]) -> DeviceResult<usize>;
+    fn get_mac(&self) -> EthernetAddress;
+    fn get_ifname(&self) -> String;
+    fn get_ip_address(&self) -> Vec<IpCidr>;
+    fn poll(&self) -> DeviceResult;
+}
--- a/drivers/src/scheme/uart.rs
+++ b/drivers/src/scheme/uart.rs
@ -0,0 +1,13 @@
+use super::{event::EventScheme, Scheme};
+use crate::DeviceResult;
+
+pub trait UartScheme: Scheme + EventScheme<Event = ()> {
+    fn try_recv(&self) -> DeviceResult<Option<u8>>;
+    fn send(&self, ch: u8) -> DeviceResult;
+    fn write_str(&self, s: &str) -> DeviceResult {
+        for c in s.bytes() {
+            self.send(c)?;
+        }
+        Ok(())
+    }
+}
--- a/drivers/src/uart/buffered.rs
+++ b/drivers/src/uart/buffered.rs
@ -0,0 +1,63 @@
+use alloc::{boxed::Box, collections::VecDeque, string::String, sync::Arc};
+
+use lock::Mutex;
+
+use crate::scheme::{impl_event_scheme, Scheme, UartScheme};
+use crate::utils::EventListener;
+use crate::DeviceResult;
+
+const BUF_CAPACITY: usize = 4096;
+
+pub struct BufferedUart {
+    inner: Arc<dyn UartScheme>,
+    buf: Mutex<VecDeque<u8>>,
+    listener: EventListener,
+    name: String,
+}
+
+impl_event_scheme!(BufferedUart);
+
+impl BufferedUart {
+    pub fn new(uart: Arc<dyn UartScheme>) -> Arc<Self> {
+        let ret = Arc::new(Self {
+            inner: uart.clone(),
+            name: alloc::format!("{}-buffered", uart.name()),
+            buf: Mutex::new(VecDeque::with_capacity(BUF_CAPACITY)),
+            listener: EventListener::new(),
+        });
+        let cloned = ret.clone();
+        uart.subscribe(Box::new(move |_| cloned.handle_irq(0)), false);
+        ret
+    }
+}
+
+impl Scheme for BufferedUart {
+    fn name(&self) -> &str {
+        self.name.as_str()
+    }
+
+    fn handle_irq(&self, _unused: usize) {
+        while let Some(c) = self.inner.try_recv().unwrap_or(None) {
+            let mut buf = self.buf.lock();
+            if buf.len() < BUF_CAPACITY {
+                let c = if c == b'\r' { b'\n' } else { c };
+                buf.push_back(c);
+            }
+        }
+        if self.buf.lock().len() > 0 {
+            self.listener.trigger(());
+        }
+    }
+}
+
+impl UartScheme for BufferedUart {
+    fn try_recv(&self) -> DeviceResult<Option<u8>> {
+        Ok(self.buf.lock().pop_front())
+    }
+    fn send(&self, ch: u8) -> DeviceResult {
+        self.inner.send(ch)
+    }
+    fn write_str(&self, s: &str) -> DeviceResult {
+        self.inner.write_str(s)
+    }
+}
--- a/drivers/src/uart/mod.rs
+++ b/drivers/src/uart/mod.rs
@ -0,0 +1,10 @@
+//! Uart device driver.
+
+mod buffered;
+mod uart_16550;
+
+pub use buffered::BufferedUart;
+pub use uart_16550::Uart16550Mmio;
+
+#[cfg(target_arch = "x86_64")]
+pub use uart_16550::Uart16550Pmio;
--- a/drivers/src/uart/uart_16550.rs
+++ b/drivers/src/uart/uart_16550.rs
@ -0,0 +1,262 @@
+use core::convert::TryInto;
+use core::ops::{BitAnd, BitOr, Not};
+
+use bitflags::bitflags;
+use lock::Mutex;
+
+use crate::io::{Io, Mmio, ReadOnly};
+use crate::scheme::{impl_event_scheme, Scheme, UartScheme};
+use crate::utils::EventListener;
+use crate::DeviceResult;
+
+bitflags! {
+    /// Interrupt enable flags
+    struct IntEnFlags: u8 {
+        const RECEIVED = 1;
+        const SENT = 1 << 1;
+        const ERRORED = 1 << 2;
+        const STATUS_CHANGE = 1 << 3;
+        // 4 to 7 are unused
+    }
+}
+
+bitflags! {
+    /// Line status flags
+    struct LineStsFlags: u8 {
+        const INPUT_FULL = 1;
+        // 1 to 4 unknown
+        const OUTPUT_EMPTY = 1 << 5;
+        // 6 and 7 unknown
+    }
+}
+
+#[repr(C)]
+struct Uart16550Inner<T: Io> {
+    /// Data register, read to receive, write to send
+    data: T,
+    /// Interrupt enable
+    int_en: T,
+    /// FIFO control
+    fifo_ctrl: T,
+    /// Line control
+    line_ctrl: T,
+    /// Modem control
+    modem_ctrl: T,
+    /// Line status
+    line_sts: ReadOnly<T>,
+    /// Modem status
+    modem_sts: ReadOnly<T>,
+}
+
+impl<T: Io> Uart16550Inner<T>
+where
+    T::Value: From<u8> + TryInto<u8>,
+{
+    fn init(&mut self) {
+        // Disable interrupts
+        self.int_en.write(0x00.into());
+
+        // Enable FIFO, clear TX/RX queues and
+        // set interrupt watermark at 14 bytes
+        self.fifo_ctrl.write(0xC7.into());
+
+        // Mark data terminal ready, signal request to send
+        // and enable auxilliary output #2 (used as interrupt line for CPU)
+        self.modem_ctrl.write(0x0B.into());
+
+        // Enable interrupts
+        self.int_en.write(0x01.into());
+    }
+
+    fn line_sts(&self) -> LineStsFlags {
+        LineStsFlags::from_bits_truncate(
+            (self.line_sts.read() & 0xFF.into()).try_into().unwrap_or(0),
+        )
+    }
+
+    fn try_recv(&mut self) -> DeviceResult<Option<u8>> {
+        if self.line_sts().contains(LineStsFlags::INPUT_FULL) {
+            Ok(Some(
+                (self.data.read() & 0xFF.into()).try_into().unwrap_or(0),
+            ))
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn send(&mut self, ch: u8) -> DeviceResult {
+        while !self.line_sts().contains(LineStsFlags::OUTPUT_EMPTY) {}
+        self.data.write(ch.into());
+        Ok(())
+    }
+
+    fn write_str(&mut self, s: &str) -> DeviceResult {
+        for b in s.bytes() {
+            match b {
+                b'\n' => {
+                    self.send(b'\r')?;
+                    self.send(b'\n')?;
+                }
+                _ => {
+                    self.send(b)?;
+                }
+            }
+        }
+        Ok(())
+    }
+}
+
+/// MMIO driver for UART 16550
+pub struct Uart16550Mmio<V: 'static>
+where
+    V: Copy + BitAnd<Output = V> + BitOr<Output = V> + Not<Output = V>,
+{
+    inner: Mutex<&'static mut Uart16550Inner<Mmio<V>>>,
+    listener: EventListener,
+}
+
+impl_event_scheme!(Uart16550Mmio<V>
+where
+    V: Copy
+        + BitAnd<Output = V>
+        + BitOr<Output = V>
+        + Not<Output = V>
+        + From<u8>
+        + TryInto<u8>
+        + Send
+);
+
+impl<V> Scheme for Uart16550Mmio<V>
+where
+    V: Copy + BitAnd<Output = V> + BitOr<Output = V> + Not<Output = V> + Send,
+{
+    fn name(&self) -> &str {
+        "uart16550-mmio"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        self.listener.trigger(());
+    }
+}
+
+impl<V> UartScheme for Uart16550Mmio<V>
+where
+    V: Copy
+        + BitAnd<Output = V>
+        + BitOr<Output = V>
+        + Not<Output = V>
+        + From<u8>
+        + TryInto<u8>
+        + Send,
+{
+    fn try_recv(&self) -> DeviceResult<Option<u8>> {
+        self.inner.lock().try_recv()
+    }
+
+    fn send(&self, ch: u8) -> DeviceResult {
+        self.inner.lock().send(ch)
+    }
+
+    fn write_str(&self, s: &str) -> DeviceResult {
+        self.inner.lock().write_str(s)
+    }
+}
+
+impl<V> Uart16550Mmio<V>
+where
+    V: Copy
+        + BitAnd<Output = V>
+        + BitOr<Output = V>
+        + Not<Output = V>
+        + From<u8>
+        + TryInto<u8>
+        + Send,
+{
+    unsafe fn new_common(base: usize) -> Self {
+        let uart: &mut Uart16550Inner<Mmio<V>> = Mmio::<V>::from_base_as(base);
+        uart.init();
+        Self {
+            inner: Mutex::new(uart),
+            listener: EventListener::new(),
+        }
+    }
+}
+
+impl Uart16550Mmio<u8> {
+    /// # Safety
+    ///
+    /// This function is unsafe because `base_addr` may be an arbitrary address.
+    pub unsafe fn new(base: usize) -> Self {
+        Self::new_common(base)
+    }
+}
+
+impl Uart16550Mmio<u32> {
+    /// # Safety
+    ///
+    /// This function is unsafe because `base_addr` may be an arbitrary address.
+    pub unsafe fn new(base: usize) -> Self {
+        Self::new_common(base)
+    }
+}
+
+#[cfg(target_arch = "x86_64")]
+mod pmio {
+    use super::*;
+    use crate::io::Pmio;
+
+    /// Pmio driver for UART 16550
+    pub struct Uart16550Pmio {
+        inner: Mutex<Uart16550Inner<Pmio<u8>>>,
+        listener: EventListener,
+    }
+
+    impl_event_scheme!(Uart16550Pmio);
+
+    impl Scheme for Uart16550Pmio {
+        fn name(&self) -> &str {
+            "uart16550-Pmio"
+        }
+
+        fn handle_irq(&self, _irq_num: usize) {
+            self.listener.trigger(());
+        }
+    }
+
+    impl UartScheme for Uart16550Pmio {
+        fn try_recv(&self) -> DeviceResult<Option<u8>> {
+            self.inner.lock().try_recv()
+        }
+
+        fn send(&self, ch: u8) -> DeviceResult {
+            self.inner.lock().send(ch)
+        }
+
+        fn write_str(&self, s: &str) -> DeviceResult {
+            self.inner.lock().write_str(s)
+        }
+    }
+
+    impl Uart16550Pmio {
+        /// Construct a `Uart16550Pmio` whose address starts at `base`.
+        pub fn new(base: u16) -> Self {
+            let mut uart = Uart16550Inner::<Pmio<u8>> {
+                data: Pmio::new(base),
+                int_en: Pmio::new(base + 1),
+                fifo_ctrl: Pmio::new(base + 2),
+                line_ctrl: Pmio::new(base + 3),
+                modem_ctrl: Pmio::new(base + 4),
+                line_sts: ReadOnly::new(Pmio::new(base + 5)),
+                modem_sts: ReadOnly::new(Pmio::new(base + 6)),
+            };
+            uart.init();
+            Self {
+                inner: Mutex::new(uart),
+                listener: EventListener::new(),
+            }
+        }
+    }
+}
+
+#[cfg(target_arch = "x86_64")]
+pub use pmio::Uart16550Pmio;
--- a/drivers/src/utils/devicetree.rs
+++ b/drivers/src/utils/devicetree.rs
@ -0,0 +1,158 @@
+//! Package of [`device_tree`].
+
+use crate::{DeviceError, DeviceResult, PhysAddr, VirtAddr};
+use alloc::vec::Vec;
+use core::ops::Range;
+use device_tree::{DeviceTree as DeviceTreeInner, PropError};
+
+pub use device_tree::{util::StringList, Node};
+
+/// A unified representation of the `interrupts` and `interrupts_extended`
+/// properties for any interrupt generating device.
+pub type InterruptsProp = Vec<u32>;
+
+/// A wrapper structure of `device_tree::DeviceTree`.
+pub struct Devicetree(DeviceTreeInner);
+
+/// Some properties inherited from ancestor nodes.
+///
+/// About the notion: cell, see <https://elinux.org/Device_Tree_Usage#How_Addressing_Works>.
+#[derive(Clone, Copy, Debug, Default)]
+pub struct InheritProps {
+    /// The `#address-cells` property of its parent node.
+    pub parent_address_cells: u32,
+    /// The `#size-cells` property of its parent node.
+    pub parent_size_cells: u32,
+    /// The `interrupt-parent` property of the node. If don't have, inherit from
+    /// its parent node.
+    pub interrupt_parent: u32,
+}
+
+impl Devicetree {
+    /// Load the device tree blob from the given virtual address.
+    pub fn from(dtb_base_vaddr: VirtAddr) -> DeviceResult<Self> {
+        match unsafe { DeviceTreeInner::load_from_raw_pointer(dtb_base_vaddr as *const _) } {
+            Ok(dt) => Ok(Self(dt)),
+            Err(err) => {
+                warn!(
+                    "device-tree: failed to load DTB @ {:#x}: {:?}",
+                    dtb_base_vaddr, err
+                );
+                Err(DeviceError::InvalidParam)
+            }
+        }
+    }
+
+    fn walk_inner<F>(&self, node: &Node, props: InheritProps, device_node_op: &mut F)
+    where
+        F: FnMut(&Node, &StringList, &InheritProps),
+    {
+        let mut props = props;
+        if let Ok(num) = node.prop_u32("interrupt-parent") {
+            props.interrupt_parent = num;
+        }
+        if let Ok(comp) = node.prop_str_list("compatible") {
+            device_node_op(node, &comp, &props);
+        }
+
+        props.parent_address_cells = node.prop_u32("#address-cells").unwrap_or(0);
+        props.parent_size_cells = node.prop_u32("#size-cells").unwrap_or(0);
+
+        // DFS
+        for child in node.children.iter() {
+            self.walk_inner(child, props, device_node_op);
+        }
+    }
+
+    /// Traverse the tree from root by DFS, collect necessary properties, and
+    /// apply the `device_node_op` to each node.
+    pub fn walk<F>(&self, device_node_op: &mut F)
+    where
+        F: FnMut(&Node, &StringList, &InheritProps),
+    {
+        self.walk_inner(&self.0.root, InheritProps::default(), device_node_op)
+    }
+
+    /// Returns the `bootargs` property in the `/chosen` node, as the kernel
+    /// command line.
+    pub fn bootargs(&self) -> Option<&str> {
+        self.0.find("/chosen")?.prop_str("bootargs").ok()
+    }
+
+    /// Returns the `timebase-frequency` property in the `/cpus` node, as timer
+    pub fn timebase_frequency(&self) -> Option<u32> {
+        self.0.find("/cpus")?.prop_u32("timebase-frequency").ok()
+    }
+
+    /// Returns the `linux,initrd-start` and `linux,initrd-end` properties in
+    /// the `/chosen` node, as the init RAM disk address region.
+    pub fn initrd_region(&self) -> Option<Range<PhysAddr>> {
+        let chosen = self.0.find("/chosen")?;
+        let start = chosen.prop_u32("linux,initrd-start").ok()? as _;
+        let end = chosen.prop_u32("linux,initrd-end").ok()? as _;
+        Some(start..end)
+    }
+
+    /// Returns the physical memory regions specified in the `/memory` nodes.
+    pub fn memory_regions(&self) -> DeviceResult<Vec<Range<PhysAddr>>> {
+        let props = InheritProps {
+            parent_address_cells: self.0.root.prop_u32("#address-cells").unwrap_or(0),
+            parent_size_cells: self.0.root.prop_u32("#size-cells").unwrap_or(0),
+            ..Default::default()
+        };
+
+        let mut regions = Vec::new();
+        for node in &self.0.root.children {
+            if node.name.starts_with("memory@")
+                || node.prop_str("device_type").unwrap_or_default() == "memory"
+            {
+                let (addr, size) = parse_reg(node, &props)?;
+                regions.push(addr as usize..addr as usize + size as usize)
+            }
+        }
+        Ok(regions)
+    }
+}
+
+/// Combine `cell_num` of 32-bit integers from `cells` into a 64-bit integer.
+fn from_cells(cells: &[u32], cell_num: u32) -> DeviceResult<u64> {
+    if cell_num as usize > cells.len() {
+        return Err(DeviceError::InvalidParam);
+    }
+    let mut value = 0;
+    for &c in &cells[..cell_num as usize] {
+        value = value << 32 | c as u64;
+    }
+    Ok(value)
+}
+
+/// Parse the `reg` property, about `reg`: <https://elinux.org/Device_Tree_Usage#How_Addressing_Works>.
+pub fn parse_reg(node: &Node, props: &InheritProps) -> DeviceResult<(u64, u64)> {
+    let cells = node.prop_cells("reg")?;
+    let addr = from_cells(&cells, props.parent_address_cells)?;
+    let size = from_cells(
+        &cells[props.parent_address_cells as usize..],
+        props.parent_size_cells,
+    )?;
+    Ok((addr, size))
+}
+
+/// Returns a `Vec<u32>` according to the `interrupts` or `interrupts-extended`
+/// property, the first element is the interrupt parent.
+pub fn parse_interrupts(node: &Node, props: &InheritProps) -> DeviceResult<InterruptsProp> {
+    if node.has_prop("interrupts-extended") {
+        Ok(node.prop_cells("interrupts-extended")?)
+    } else if node.has_prop("interrupts") && props.interrupt_parent > 0 {
+        let mut ret = node.prop_cells("interrupts")?;
+        ret.insert(0, props.interrupt_parent);
+        Ok(ret)
+    } else {
+        Ok(Vec::new())
+    }
+}
+
+impl From<PropError> for DeviceError {
+    fn from(_err: PropError) -> Self {
+        Self::InvalidParam
+    }
+}
--- a/drivers/src/utils/event_listener.rs
+++ b/drivers/src/utils/event_listener.rs
@ -0,0 +1,45 @@
+use alloc::{boxed::Box, vec::Vec};
+
+use lock::Mutex;
+
+/// A type alias for the closure to handle device event.
+pub type EventHandler<T = ()> = Box<dyn Fn(&T) + Send + Sync>;
+
+/// Device event listener.
+///
+/// It keeps a series of [`EventHandler`]s that handle events of one single type.
+pub struct EventListener<T = ()> {
+    events: Mutex<Vec<(EventHandler<T>, bool)>>,
+}
+
+impl<T> EventListener<T> {
+    /// Construct a new, empty `EventListener`.
+    pub fn new() -> Self {
+        Self {
+            events: Mutex::new(Vec::new()),
+        }
+    }
+
+    /// Register a new `handler` into this `EventListener`.
+    ///
+    /// If `once` is `true`, the `handler` will be removed once it handles an event.
+    pub fn subscribe(&self, handler: EventHandler<T>, once: bool) {
+        self.events.lock().push((handler, once));
+    }
+
+    /// Send an event to the `EventListener`.
+    ///
+    /// All the handlers handle the event, and those marked `once` will be removed immediately.
+    pub fn trigger(&self, event: T) {
+        self.events.lock().retain(|(f, once)| {
+            f(&event);
+            !once
+        });
+    }
+}
+
+impl<T> Default for EventListener<T> {
+    fn default() -> Self {
+        Self::new()
+    }
+}
--- a/drivers/src/utils/graphic_console.rs
+++ b/drivers/src/utils/graphic_console.rs
@ -0,0 +1,58 @@
+use alloc::sync::Arc;
+use core::convert::Infallible;
+use core::ops::{Deref, DerefMut};
+
+use rcore_console::{Console, ConsoleOnGraphic, DrawTarget, OriginDimensions, Pixel, Rgb888, Size};
+
+use crate::scheme::DisplayScheme;
+
+pub struct DisplayWrapper(Arc<dyn DisplayScheme>);
+
+pub struct GraphicConsole {
+    inner: ConsoleOnGraphic<DisplayWrapper>,
+}
+
+impl GraphicConsole {
+    pub fn new(display: Arc<dyn DisplayScheme>) -> Self {
+        Self {
+            inner: Console::on_frame_buffer(DisplayWrapper(display)),
+        }
+    }
+}
+
+impl DrawTarget for DisplayWrapper {
+    type Color = Rgb888;
+    type Error = Infallible;
+
+    fn draw_iter<I>(&mut self, pixels: I) -> Result<(), Self::Error>
+    where
+        I: IntoIterator<Item = Pixel<Self::Color>>,
+    {
+        for p in pixels {
+            let color = unsafe { core::mem::transmute(p.1) };
+            self.0.draw_pixel(p.0.x as u32, p.0.y as u32, color);
+        }
+        Ok(())
+    }
+}
+
+impl OriginDimensions for DisplayWrapper {
+    fn size(&self) -> Size {
+        let info = self.0.info();
+        Size::new(info.width, info.height)
+    }
+}
+
+impl Deref for GraphicConsole {
+    type Target = ConsoleOnGraphic<DisplayWrapper>;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl DerefMut for GraphicConsole {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.inner
+    }
+}
--- a/drivers/src/utils/id_allocator.rs
+++ b/drivers/src/utils/id_allocator.rs
@ -0,0 +1,105 @@
+use alloc::boxed::Box;
+use core::ops::{Deref, DerefMut, Range};
+
+use bitmap_allocator::{BitAlloc, BitAlloc16, BitAlloc256, BitAlloc4K, BitAlloc64K};
+
+use crate::{DeviceError, DeviceResult};
+
+pub trait IdAllocatorWrapper: Send + Sync {
+    fn new(range: Range<usize>) -> Self
+    where
+        Self: Sized;
+    fn alloc(&mut self) -> DeviceResult<usize>;
+    fn alloc_fixed(&mut self, id: usize) -> DeviceResult;
+    fn alloc_contiguous(&mut self, count: usize, align_log2: usize) -> DeviceResult<usize>;
+    fn free(&mut self, start_id: usize, count: usize) -> DeviceResult;
+    fn is_alloced(&self, id: usize) -> bool;
+}
+
+pub struct IdAllocator(Box<dyn IdAllocatorWrapper>);
+
+impl IdAllocator {
+    pub fn new(range: Range<usize>) -> DeviceResult<Self> {
+        Ok(match range.end {
+            0..=0x10 => Self(Box::new(IdAllocator16::new(range))),
+            0x11..=0x100 => Self(Box::new(IdAllocator256::new(range))),
+            0x101..=0x1000 => Self(Box::new(IdAllocator4K::new(range))),
+            0x1001..=0x10000 => Self(Box::new(IdAllocator64K::new(range))),
+            _ => {
+                warn!("out of range in IdAllocator::new(): {:#x?}", range);
+                return Err(DeviceError::InvalidParam);
+            }
+        })
+    }
+}
+
+impl Deref for IdAllocator {
+    type Target = Box<dyn IdAllocatorWrapper>;
+    fn deref(&self) -> &Self::Target {
+        &self.0
+    }
+}
+
+impl DerefMut for IdAllocator {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        &mut self.0
+    }
+}
+
+macro_rules! define_allocator {
+    ($name: ident, $inner: ty) => {
+        struct $name($inner);
+
+        impl IdAllocatorWrapper for $name {
+            fn new(range: Range<usize>) -> Self {
+                let mut inner = <$inner>::DEFAULT;
+                inner.insert(range);
+                Self(inner)
+            }
+
+            fn alloc(&mut self) -> DeviceResult<usize> {
+                self.0.alloc().ok_or(DeviceError::NoResources)
+            }
+
+            fn alloc_fixed(&mut self, id: usize) -> DeviceResult {
+                if self.0.test(id) {
+                    self.0.remove(id..id + 1);
+                    Ok(())
+                } else {
+                    Err(DeviceError::AlreadyExists)
+                }
+            }
+
+            fn alloc_contiguous(&mut self, count: usize, align_log2: usize) -> DeviceResult<usize> {
+                self.0
+                    .alloc_contiguous(count, align_log2)
+                    .ok_or(DeviceError::InvalidParam)
+            }
+
+            fn free(&mut self, start_id: usize, count: usize) -> DeviceResult {
+                if count == 0 {
+                    Err(DeviceError::InvalidParam)
+                } else if count == 1 {
+                    if !self.is_alloced(start_id) {
+                        Err(DeviceError::InvalidParam)
+                    } else {
+                        self.0.dealloc(start_id);
+                        Ok(())
+                    }
+                } else {
+                    self.0.insert(start_id..start_id + count);
+                    Ok(())
+                }
+            }
+
+            fn is_alloced(&self, id: usize) -> bool {
+                !self.0.test(id)
+            }
+        }
+    };
+}
+
+define_allocator!(IdAllocator16, BitAlloc16);
+define_allocator!(IdAllocator256, BitAlloc256);
+define_allocator!(IdAllocator4K, BitAlloc4K);
+define_allocator!(IdAllocator64K, BitAlloc64K);
--- a/drivers/src/utils/irq_manager.rs
+++ b/drivers/src/utils/irq_manager.rs
@ -0,0 +1,84 @@
+#![allow(dead_code)]
+
+use core::ops::Range;
+
+use super::IdAllocator;
+use crate::{prelude::IrqHandler, DeviceError, DeviceResult};
+
+pub struct IrqManager<const IRQ_COUNT: usize> {
+    irq_range: Range<usize>,
+    table: [Option<IrqHandler>; IRQ_COUNT],
+    allocator: IdAllocator,
+}
+
+impl<const IRQ_COUNT: usize> IrqManager<IRQ_COUNT> {
+    pub fn new(irq_range: Range<usize>) -> Self {
+        assert!(irq_range.end <= IRQ_COUNT);
+        const EMPTY_HANDLER: Option<IrqHandler> = None;
+        let allocator = IdAllocator::new(irq_range.clone()).unwrap();
+        Self {
+            irq_range,
+            table: [EMPTY_HANDLER; IRQ_COUNT],
+            allocator,
+        }
+    }
+
+    pub fn alloc_block(&mut self, count: usize) -> DeviceResult<usize> {
+        info!("IRQ alloc_block {}", count);
+        debug_assert!(count.is_power_of_two());
+        let align_log2 = 31 - (count as u32).leading_zeros();
+        self.allocator.alloc_contiguous(count, align_log2 as _)
+    }
+
+    pub fn free_block(&mut self, start: usize, count: usize) -> DeviceResult {
+        info!("IRQ free_block {:#x?}", start..start + count);
+        self.allocator.free(start, count)
+    }
+
+    /// Add a handler to IRQ table. if `irq_num == 0`, we need to allocate one.
+    /// Returns the specified IRQ number or an allocated IRQ on success.
+    pub fn register_handler(&mut self, irq_num: usize, handler: IrqHandler) -> DeviceResult<usize> {
+        info!("IRQ register handler {}", irq_num);
+        let irq_num = if irq_num == 0 {
+            // allocate a valid IRQ number
+            self.allocator.alloc()?
+        } else if self.irq_range.contains(&irq_num) {
+            self.allocator.alloc_fixed(irq_num)?;
+            irq_num
+        } else {
+            return Err(DeviceError::InvalidParam);
+        };
+        self.table[irq_num] = Some(handler);
+        Ok(irq_num)
+    }
+
+    pub fn unregister_handler(&mut self, irq_num: usize) -> DeviceResult {
+        info!("IRQ unregister handler {}", irq_num);
+        if !self.allocator.is_alloced(irq_num) {
+            Err(DeviceError::InvalidParam)
+        } else {
+            self.allocator.free(irq_num, 1)?;
+            self.table[irq_num] = None;
+            Ok(())
+        }
+    }
+
+    pub fn overwrite_handler(&mut self, irq_num: usize, handler: IrqHandler) -> DeviceResult {
+        info!("IRQ overwrite handle {}", irq_num);
+        if !self.allocator.is_alloced(irq_num) {
+            Err(DeviceError::InvalidParam)
+        } else {
+            self.table[irq_num] = Some(handler);
+            Ok(())
+        }
+    }
+
+    pub fn handle(&self, irq_num: usize) -> DeviceResult {
+        if let Some(f) = &self.table[irq_num] {
+            f();
+            Ok(())
+        } else {
+            Err(DeviceError::InvalidParam)
+        }
+    }
+}
--- a/drivers/src/utils/mod.rs
+++ b/drivers/src/utils/mod.rs
@ -0,0 +1,20 @@
+//! Event handler and device tree.
+
+#![allow(unused_imports)]
+
+mod event_listener;
+mod id_allocator;
+mod irq_manager;
+
+#[cfg(feature = "graphic")]
+mod graphic_console;
+
+pub mod devicetree;
+
+pub(super) use id_allocator::IdAllocator;
+pub(super) use irq_manager::IrqManager;
+
+pub use event_listener::{EventHandler, EventListener};
+
+#[cfg(feature = "graphic")]
+pub use graphic_console::GraphicConsole;
--- a/drivers/src/virtio/blk.rs
+++ b/drivers/src/virtio/blk.rs
@ -0,0 +1,43 @@
+use lock::Mutex;
+use virtio_drivers::{VirtIOBlk as InnerDriver, VirtIOHeader};
+
+use crate::scheme::{BlockScheme, Scheme};
+use crate::DeviceResult;
+
+pub struct VirtIoBlk<'a> {
+    inner: Mutex<InnerDriver<'a>>,
+}
+
+impl<'a> VirtIoBlk<'a> {
+    pub fn new(header: &'static mut VirtIOHeader) -> DeviceResult<Self> {
+        Ok(Self {
+            inner: Mutex::new(InnerDriver::new(header)?),
+        })
+    }
+}
+
+impl<'a> Scheme for VirtIoBlk<'a> {
+    fn name(&self) -> &str {
+        "virtio-blk"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        self.inner.lock().ack_interrupt();
+    }
+}
+
+impl<'a> BlockScheme for VirtIoBlk<'a> {
+    fn read_block(&self, block_id: usize, buf: &mut [u8]) -> DeviceResult {
+        self.inner.lock().read_block(block_id, buf)?;
+        Ok(())
+    }
+
+    fn write_block(&self, block_id: usize, buf: &[u8]) -> DeviceResult {
+        self.inner.lock().write_block(block_id, buf)?;
+        Ok(())
+    }
+
+    fn flush(&self) -> DeviceResult {
+        Ok(())
+    }
+}
--- a/drivers/src/virtio/console.rs
+++ b/drivers/src/virtio/console.rs
@ -0,0 +1,55 @@
+use core::fmt::{Result, Write};
+
+use lock::Mutex;
+use virtio_drivers::{VirtIOConsole as InnerDriver, VirtIOHeader};
+
+use crate::prelude::DeviceResult;
+use crate::scheme::{impl_event_scheme, Scheme, UartScheme};
+use crate::utils::EventListener;
+
+pub struct VirtIoConsole<'a> {
+    inner: Mutex<InnerDriver<'a>>,
+    listener: EventListener,
+}
+
+impl_event_scheme!(VirtIoConsole<'_>);
+
+impl<'a> VirtIoConsole<'a> {
+    pub fn new(header: &'static mut VirtIOHeader) -> DeviceResult<Self> {
+        Ok(Self {
+            inner: Mutex::new(InnerDriver::new(header)?),
+            listener: EventListener::new(),
+        })
+    }
+}
+
+impl<'a> Scheme for VirtIoConsole<'a> {
+    fn name(&self) -> &str {
+        "virtio-console"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        self.inner.lock().ack_interrupt().unwrap();
+        self.listener.trigger(());
+    }
+}
+
+impl<'a> UartScheme for VirtIoConsole<'a> {
+    fn try_recv(&self) -> DeviceResult<Option<u8>> {
+        Ok(self.inner.lock().recv(true)?)
+    }
+
+    fn send(&self, ch: u8) -> DeviceResult {
+        self.inner.lock().send(ch)?;
+        Ok(())
+    }
+}
+
+impl<'a> Write for VirtIoConsole<'a> {
+    fn write_str(&mut self, s: &str) -> Result {
+        for b in s.bytes() {
+            self.send(b).unwrap()
+        }
+        Ok(())
+    }
+}
--- a/drivers/src/virtio/gpu.rs
+++ b/drivers/src/virtio/gpu.rs
@ -0,0 +1,77 @@
+use lock::Mutex;
+use virtio_drivers::{VirtIOGpu as InnerDriver, VirtIOHeader};
+
+use crate::prelude::{ColorFormat, DisplayInfo, FrameBuffer};
+use crate::scheme::{DisplayScheme, Scheme};
+use crate::DeviceResult;
+
+pub struct VirtIoGpu<'a> {
+    info: DisplayInfo,
+    inner: Mutex<InnerDriver<'a>>,
+}
+
+const CURSOR_HOT_X: u32 = 13;
+const CURSOR_HOT_Y: u32 = 11;
+static CURSOR_IMG: &[u8] = include_bytes!("../display/resource/cursor.bin"); // 64 x 64 x 4
+
+impl<'a> VirtIoGpu<'a> {
+    pub fn new(header: &'static mut VirtIOHeader) -> DeviceResult<Self> {
+        let mut gpu = InnerDriver::new(header)?;
+        let fb = gpu.setup_framebuffer()?;
+        let fb_base_vaddr = fb.as_ptr() as usize;
+        let fb_size = fb.len();
+        let (width, height) = gpu.resolution();
+        let info = DisplayInfo {
+            width,
+            height,
+            format: ColorFormat::ARGB8888,
+            fb_base_vaddr,
+            fb_size,
+        };
+        gpu.setup_cursor(
+            CURSOR_IMG,
+            width / 2,
+            height / 2,
+            CURSOR_HOT_X,
+            CURSOR_HOT_Y,
+        )?;
+        Ok(Self {
+            info,
+            inner: Mutex::new(gpu),
+        })
+    }
+}
+
+impl<'a> Scheme for VirtIoGpu<'a> {
+    fn name(&self) -> &str {
+        "virtio-gpu"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        self.inner.lock().ack_interrupt();
+    }
+}
+
+impl<'a> DisplayScheme for VirtIoGpu<'a> {
+    #[inline]
+    fn info(&self) -> DisplayInfo {
+        self.info
+    }
+
+    #[inline]
+    fn fb(&self) -> FrameBuffer {
+        unsafe {
+            FrameBuffer::from_raw_parts_mut(self.info.fb_base_vaddr as *mut u8, self.info.fb_size)
+        }
+    }
+
+    #[inline]
+    fn need_flush(&self) -> bool {
+        true
+    }
+
+    fn flush(&self) -> DeviceResult {
+        self.inner.lock().flush()?;
+        Ok(())
+    }
+}
--- a/drivers/src/virtio/input.rs
+++ b/drivers/src/virtio/input.rs
@ -0,0 +1,78 @@
+use core::convert::TryFrom;
+
+use lock::Mutex;
+use virtio_drivers::{InputConfigSelect, VirtIOHeader, VirtIOInput as InnerDriver};
+
+use crate::prelude::{CapabilityType, InputCapability, InputEvent, InputEventType};
+use crate::scheme::{impl_event_scheme, InputScheme, Scheme};
+use crate::utils::EventListener;
+use crate::DeviceResult;
+
+pub struct VirtIoInput<'a> {
+    inner: Mutex<InnerDriver<'a>>,
+    listener: EventListener<InputEvent>,
+}
+
+impl<'a> VirtIoInput<'a> {
+    pub fn new(header: &'static mut VirtIOHeader) -> DeviceResult<Self> {
+        let inner = Mutex::new(InnerDriver::new(header)?);
+        Ok(Self {
+            inner,
+            listener: EventListener::new(),
+        })
+    }
+}
+
+impl_event_scheme!(VirtIoInput<'_>, InputEvent);
+
+impl<'a> Scheme for VirtIoInput<'a> {
+    fn name(&self) -> &str {
+        "virtio-input"
+    }
+
+    fn handle_irq(&self, _irq_num: usize) {
+        let mut inner = self.inner.lock();
+        inner.ack_interrupt();
+        while let Some(e) = inner.pop_pending_event() {
+            if let Ok(event_type) = InputEventType::try_from(e.event_type) {
+                self.listener.trigger(InputEvent {
+                    event_type,
+                    code: e.code,
+                    value: e.value as i32,
+                });
+            }
+        }
+    }
+}
+
+impl<'a> InputScheme for VirtIoInput<'a> {
+    fn capability(&self, cap_type: CapabilityType) -> InputCapability {
+        let mut inner = self.inner.lock();
+        let mut bitmap = [0u8; 128];
+        match cap_type {
+            CapabilityType::InputProp => {
+                let size = inner.query_config_select(InputConfigSelect::PropBits, 0, &mut bitmap);
+                InputCapability::from_bitmap(&bitmap[..size as usize])
+            }
+            CapabilityType::Event => {
+                let mut cap = InputCapability::empty();
+                for i in 0..crate::input::input_event_codes::ev::EV_CNT {
+                    let size =
+                        inner.query_config_select(InputConfigSelect::EvBits, i as u8, &mut bitmap);
+                    if size > 0 {
+                        cap.set(i);
+                    }
+                }
+                cap
+            }
+            _ => {
+                let size = inner.query_config_select(
+                    InputConfigSelect::EvBits,
+                    cap_type as u8,
+                    &mut bitmap,
+                );
+                InputCapability::from_bitmap(&bitmap[..size as usize])
+            }
+        }
+    }
+}
--- a/drivers/src/virtio/mod.rs
+++ b/drivers/src/virtio/mod.rs
@ -0,0 +1,28 @@
+//! Packaging of [`virtio-drivers` library](https://github.com/rcore-os/virtio-drivers).
+
+mod blk;
+mod console;
+mod gpu;
+mod input;
+
+pub use blk::VirtIoBlk;
+pub use console::VirtIoConsole;
+pub use gpu::VirtIoGpu;
+pub use input::VirtIoInput;
+
+use crate::DeviceError;
+use core::convert::From;
+use virtio_drivers::Error;
+
+impl From<Error> for DeviceError {
+    fn from(err: Error) -> Self {
+        match err {
+            Error::BufferTooSmall => Self::BufferTooSmall,
+            Error::NotReady => Self::NotReady,
+            Error::InvalidParam => Self::InvalidParam,
+            Error::DmaError => Self::DmaError,
+            Error::AlreadyUsed => Self::AlreadyExists,
+            Error::IoError => Self::IoError,
+        }
+    }
+}
--- a/kernel-hal-bare/Cargo.toml
+++ b/kernel-hal-bare/Cargo.toml
@ -1,37 +0,0 @@
-[package]
-name = "kernel-hal-bare"
-version = "0.1.0"
-authors = ["Runji Wang <wangrunji0408@163.com>"]
-edition = "2018"
-description = "Kernel HAL implementation for bare metal environment."
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-log = "0.4"
-spin = "0.7"
-git-version = "0.3"
-executor = { git = "https://github.com/rcore-os/executor.git", rev = "a2d02ee9" }
-trapframe = "0.8.0"
-kernel-hal = { path = "../kernel-hal" }
-naive-timer = "0.1.0"
-lazy_static = { version = "1.4", features = ["spin_no_std" ] }
-
-[target.'cfg(target_arch = "x86_64")'.dependencies]
-x86_64 = "0.14"
-uart_16550 = "=0.2.15"
-raw-cpuid = "9.0"
-pc-keyboard = "0.5"
-apic = { git = "https://github.com/rcore-os/apic-rs", rev = "fb86bd7" }
-x86-smpboot = { git = "https://github.com/rcore-os/x86-smpboot", rev = "43ffedf" }
-rcore-console = { git = "https://github.com/rcore-os/rcore-console", default-features = false, rev = "a980897b" }
-acpi = "1.1"
-
-[target.'cfg(any(target_arch = "riscv32", target_arch = "riscv64"))'.dependencies]
-riscv = { git = "https://github.com/rcore-os/riscv", features = ["inline-asm"], rev = "0074cbc" }
-# 注意rev版本号必须与其他组件的完全一致，不可多字符
-rcore-fs = { git = "https://github.com/rcore-os/rcore-fs", rev = "6df6cd2" }
-device_tree = { git = "https://github.com/rcore-os/device_tree-rs" }
-virtio-drivers = { git = "https://github.com/rcore-os/virtio-drivers", rev = "568276" }
-bitflags = "1.0"
-volatile = "0.2"
--- a/kernel-hal-bare/src/arch/mod.rs
+++ b/kernel-hal-bare/src/arch/mod.rs
@ -1,9 +0,0 @@
-#[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
-mod riscv;
-#[cfg(target_arch = "x86_64")]
-mod x86_64;
-
-#[cfg(any(target_arch = "riscv32", target_arch = "riscv64"))]
-pub use self::riscv::*;
-#[cfg(target_arch = "x86_64")]
-pub use self::x86_64::*;
--- a/kernel-hal-bare/src/arch/riscv/consts.rs
+++ b/kernel-hal-bare/src/arch/riscv/consts.rs
@ -1,31 +0,0 @@
-// RISCV
-// Linear mapping
-#[cfg(target_arch = "riscv32")]
-pub const PHYSICAL_MEMORY_OFFSET: usize = 0x4000_0000;
-#[cfg(target_arch = "riscv64")]
-pub const PHYSICAL_MEMORY_OFFSET: usize = 0xFFFF_FFFF_0000_0000;
-
-#[cfg(target_arch = "riscv32")]
-pub const KERNEL_OFFSET: usize = 0xC000_0000;
-#[cfg(target_arch = "riscv64")]
-pub const KERNEL_OFFSET: usize = 0xFFFF_FFFF_8000_0000;
-
-pub const MEMORY_OFFSET: usize = 0x8000_0000;
-// TODO: get memory end from device tree
-pub const MEMORY_END: usize = 0x8800_0000;
-
-// TODO: rv64 `sh` and `ls` will crash if stack top > 0x80000000 ???
-pub const USER_STACK_OFFSET: usize = 0x40000000 - USER_STACK_SIZE;
-pub const USER_STACK_SIZE: usize = 0x10000;
-
-#[cfg(target_arch = "riscv32")]
-pub const KSEG2_START: usize = 0xfe80_0000;
-#[cfg(target_arch = "riscv64")]
-pub const KSEG2_START: usize = 0xffff_fe80_0000_0000;
-
-pub const MAX_DTB_SIZE: usize = 0x2000;
-
-#[cfg(target_arch = "riscv64")]
-pub const ARCH: &'static str = "riscv64";
-#[cfg(target_arch = "riscv32")]
-pub const ARCH: &'static str = "riscv32";
--- a/kernel-hal-bare/src/arch/riscv/interrupt.rs
+++ b/kernel-hal-bare/src/arch/riscv/interrupt.rs
@ -1,385 +0,0 @@
-use alloc::boxed::Box;
-use alloc::vec::Vec;
-use riscv::register::{
-    satp,
-    scause::{self, Exception, Interrupt, Trap},
-    sie, sstatus, stval,
-};
-use spin::Mutex;
-use trapframe::{TrapFrame, UserContext};
-
-/*
-use crate::timer::{
-    TICKS,
-    clock_set_next_event,
-    clock_close,
-};
-*/
-
-//use crate::context::TrapFrame;
-use super::plic;
-use super::sbi;
-use super::uart;
-
-use super::consts::PHYSICAL_MEMORY_OFFSET;
-use super::timer_set_next;
-use crate::{map_range, phys_to_virt, putfmt};
-
-//global_asm!(include_str!("trap.asm"));
-
-/*
-#[repr(C)]
-pub struct TrapFrame{
-    pub x: [usize; 32], //General registers
-    pub sstatus: Sstatus,
-    pub sepc: usize,
-    pub stval: usize,
-    pub scause: Scause,
-}
-*/
-
-const TABLE_SIZE: usize = 256;
-pub type InterruptHandle = Box<dyn Fn() + Send + Sync>;
-lazy_static! {
-    static ref IRQ_TABLE: Mutex<Vec<Option<InterruptHandle>>> = Default::default();
-}
-
-fn init_irq() {
-    init_irq_table();
-    irq_add_handle(Timer, Box::new(super_timer)); //模拟参照了x86_64,把timer处理函数也放进去了
-                                                  //irq_add_handle(Keyboard, Box::new(keyboard));
-    irq_add_handle(S_PLIC, Box::new(plic::handle_interrupt));
-}
-
-pub fn init() {
-    unsafe {
-        sstatus::set_sie();
-
-        init_uart();
-
-        sie::set_sext();
-        init_ext();
-    }
-
-    init_irq();
-
-    bare_println!("+++ setup interrupt +++");
-}
-
-#[no_mangle]
-pub extern "C" fn trap_handler(tf: &mut TrapFrame) {
-    let sepc = tf.sepc;
-    let scause = scause::read();
-    let stval = stval::read();
-    let is_int = scause.bits() >> 63;
-    let code = scause.bits() & !(1 << 63);
-
-    match scause.cause() {
-        Trap::Exception(Exception::Breakpoint) => breakpoint(&mut tf.sepc),
-        Trap::Exception(Exception::IllegalInstruction) => {
-            panic!("IllegalInstruction: {:#x}->{:#x}", sepc, stval)
-        }
-        Trap::Exception(Exception::LoadFault) => {
-            panic!("Load access fault: {:#x}->{:#x}", sepc, stval)
-        }
-        Trap::Exception(Exception::StoreFault) => {
-            panic!("Store access fault: {:#x}->{:#x}", sepc, stval)
-        }
-        Trap::Exception(Exception::LoadPageFault) => page_fault(stval, tf),
-        Trap::Exception(Exception::StorePageFault) => page_fault(stval, tf),
-        Trap::Exception(Exception::InstructionPageFault) => page_fault(stval, tf),
-        Trap::Interrupt(Interrupt::SupervisorTimer) => super_timer(),
-        Trap::Interrupt(Interrupt::SupervisorSoft) => super_soft(),
-        Trap::Interrupt(Interrupt::SupervisorExternal) => plic::handle_interrupt(),
-        //Trap::Interrupt(Interrupt::SupervisorExternal) => irq_handle(code as u8),
-        _ => panic!("Undefined Trap: {:#x} {:#x}", is_int, code),
-    }
-}
-
-fn init_irq_table() {
-    let mut table = IRQ_TABLE.lock();
-    for _ in 0..TABLE_SIZE {
-        table.push(None);
-    }
-}
-
-#[export_name = "hal_irq_handle"]
-pub fn irq_handle(irq: u8) {
-    debug!("PLIC handle: {:#x}", irq);
-    let table = IRQ_TABLE.lock();
-    match &table[irq as usize] {
-        Some(f) => f(),
-        None => panic!("unhandled U-mode external IRQ number: {}", irq),
-    }
-}
-
-/// Add a handle to IRQ table. Return the specified irq or an allocated irq on success
-#[export_name = "hal_irq_add_handle"]
-pub fn irq_add_handle(irq: u8, handle: InterruptHandle) -> Option<u8> {
-    info!("IRQ add handle {:#x?}", irq);
-    let mut table = IRQ_TABLE.lock();
-    // allocate a valid irq number
-    // why?
-    if irq == 0 {
-        let mut id = 0x20;
-        while id < table.len() {
-            if table[id].is_none() {
-                table[id] = Some(handle);
-                return Some(id as u8);
-            }
-            id += 1;
-        }
-        return None;
-    }
-
-    match table[irq as usize] {
-        Some(_) => None,
-        None => {
-            table[irq as usize] = Some(handle);
-            Some(irq)
-        }
-    }
-}
-
-#[export_name = "hal_irq_remove_handle"]
-pub fn irq_remove_handle(irq: u8) -> bool {
-    info!("IRQ remove handle {:#x?}", irq);
-    let irq = irq as usize;
-    let mut table = IRQ_TABLE.lock();
-    match table[irq] {
-        Some(_) => {
-            table[irq] = None;
-            false
-        }
-        None => true,
-    }
-}
-
-/*
-#[export_name = "hal_irq_allocate_block"]
-pub fn allocate_block(irq_num: u32) -> Option<(usize, usize)> {
-    info!("hal_irq_allocate_block: count={:#x?}", irq_num);
-    let irq_num = u32::next_power_of_two(irq_num) as usize;
-    let mut irq_start = 0x20;
-    let mut irq_cur = irq_start;
-    let mut table = IRQ_TABLE.lock();
-    while irq_cur < TABLE_SIZE && irq_cur < irq_start + irq_num {
-        if table[irq_cur].is_none() {
-            irq_cur += 1;
-        } else {
-            irq_start = (irq_cur - irq_cur % irq_num) + irq_num;
-            irq_cur = irq_start;
-        }
-    }
-    for i in irq_start..irq_start + irq_num {
-        table[i] = Some(Box::new(|| {}));
-    }
-    info!(
-        "hal_irq_allocate_block: start={:#x?} num={:#x?}",
-        irq_start, irq_num
-    );
-    Some((irq_start, irq_num))
-}
-
-#[export_name = "hal_irq_free_block"]
-pub fn free_block(irq_start: u32, irq_num: u32) {
-    let mut table = IRQ_TABLE.lock();
-    for i in irq_start..irq_start + irq_num {
-        table[i as usize] = None;
-    }
-}
-*/
-
-#[export_name = "hal_irq_overwrite_handler"]
-pub fn overwrite_handler(msi_id: u32, handle: Box<dyn Fn() + Send + Sync>) -> bool {
-    info!("IRQ overwrite handle {:#x?}", msi_id);
-    let mut table = IRQ_TABLE.lock();
-    let set = table[msi_id as usize].is_none();
-    table[msi_id as usize] = Some(handle);
-    set
-}
-
-fn breakpoint(sepc: &mut usize) {
-    bare_println!("Exception::Breakpoint: A breakpoint set @0x{:x} ", sepc);
-
-    //sepc为触发中断指令ebreak的地址
-    //防止无限循环中断，让sret返回时跳转到sepc的下一条指令地址
-    *sepc += 2
-}
-
-fn page_fault(stval: usize, tf: &mut TrapFrame) {
-    let this_scause = scause::read();
-    info!(
-        "EXCEPTION Page Fault: {:?} @ {:#x}->{:#x}",
-        this_scause.cause(),
-        tf.sepc,
-        stval
-    );
-    let vaddr = stval;
-
-    use crate::PageTableImpl;
-    use kernel_hal::{MMUFlags, PageTableTrait};
-    use riscv::addr::{Page, PhysAddr, VirtAddr};
-    use riscv::paging::{PageTableFlags as PTF, Rv39PageTable, *};
-
-    //let mut flags = PTF::VALID;
-    let code = this_scause.code();
-    let mut flags = if code == 15 {
-        //MMUFlags::WRITE ???
-        MMUFlags::READ | MMUFlags::WRITE
-    } else if code == 12 {
-        MMUFlags::EXECUTE
-    } else {
-        MMUFlags::READ
-    };
-
-    let linear_offset = if stval >= PHYSICAL_MEMORY_OFFSET {
-        // Kernel
-        PHYSICAL_MEMORY_OFFSET
-    } else {
-        // User
-        0
-    };
-
-    /*
-    let current =
-        unsafe { &mut *(phys_to_virt(satp::read().frame().start_address().as_usize()) as *mut PageTable) };
-    let mut pt = Rv39PageTable::new(current, PHYSICAL_MEMORY_OFFSET);
-    map_range(&mut pt, vaddr, vaddr, linear_offset, flags);
-    */
-
-    let mut pti = PageTableImpl {
-        root_paddr: satp::read().frame().start_address().as_usize(),
-    };
-
-    let page = Page::of_addr(VirtAddr::new(vaddr));
-    if let Ok(pte) = pti.get().ref_entry(page) {
-        let pte = unsafe { &mut *(pte as *mut PageTableEntry) };
-        if !pte.is_unused() {
-            debug!(
-                "PageAlreadyMapped -> {:#x?}, {:?}",
-                pte.addr().as_usize(),
-                pte.flags()
-            );
-            //TODO update flags
-
-            pti.unmap(vaddr).unwrap();
-        }
-    };
-    pti.map(vaddr, vaddr - linear_offset, flags).unwrap();
-}
-
-fn super_timer() {
-    timer_set_next();
-    super::timer_tick();
-
-    //bare_print!(".");
-
-    //发生外界中断时，epc的指令还没有执行，故无需修改epc到下一条
-}
-
-fn init_uart() {
-    uart::Uart::new(0x1000_0000 + PHYSICAL_MEMORY_OFFSET).simple_init();
-
-    //但当没有SBI_CONSOLE_PUTCHAR时，却为什么不行？
-    super::putfmt_uart(format_args!("{}", "Uart output testing\n"));
-
-    bare_println!("+++ Setting up UART interrupts +++");
-}
-
-//被plic串口中断调用
-pub fn try_process_serial() -> bool {
-    match super::getchar_option() {
-        Some(ch) => {
-            super::serial_put(ch);
-            true
-        }
-        None => false,
-    }
-}
-
-pub fn init_ext() {
-    // Qemu virt
-    // UART0 = 10
-    plic::set_priority(10, 7);
-    plic::set_threshold(0);
-    plic::enable(10);
-
-    bare_println!("+++ Setting up PLIC +++");
-}
-
-fn super_soft() {
-    sbi::clear_ipi();
-    bare_println!("Interrupt::SupervisorSoft!");
-}
-
-pub fn init_soft() {
-    unsafe {
-        sie::set_ssoft();
-    }
-    bare_println!("+++ setup soft int! +++");
-}
-
-#[export_name = "fetch_trap_num"]
-pub fn fetch_trap_num(_context: &UserContext) -> usize {
-    scause::read().bits()
-}
-
-pub fn wait_for_interrupt() {
-    unsafe {
-        // enable interrupt and disable
-        let sie = riscv::register::sstatus::read().sie();
-        riscv::register::sstatus::set_sie();
-        riscv::asm::wfi();
-        if !sie {
-            riscv::register::sstatus::clear_sie();
-        }
-    }
-}
-
-fn timer() {
-    super::timer_tick();
-}
-
-/*
- * 改道uart::handle_interrupt()中
- *
-fn com1() {
-    let c = super::COM1.lock().receive();
-    super::serial_put(c);
-}
-*/
-
-/*
-fn keyboard() {
-    use pc_keyboard::{DecodedKey, KeyCode};
-    if let Some(key) = super::keyboard::receive() {
-        match key {
-            DecodedKey::Unicode(c) => super::serial_put(c as u8),
-            DecodedKey::RawKey(code) => {
-                let s = match code {
-                    KeyCode::ArrowUp => "\u{1b}[A",
-                    KeyCode::ArrowDown => "\u{1b}[B",
-                    KeyCode::ArrowRight => "\u{1b}[C",
-                    KeyCode::ArrowLeft => "\u{1b}[D",
-                    _ => "",
-                };
-                for c in s.bytes() {
-                    super::serial_put(c);
-                }
-            }
-        }
-    }
-}
-*/
-
-// IRQ
-const Timer: u8 = 5;
-const U_PLIC: u8 = 8;
-const S_PLIC: u8 = 9;
-const M_PLIC: u8 = 11;
-
-//const Keyboard: u8 = 1;
-//const COM2: u8 = 3;
-const COM1: u8 = 0;
-//const IDE: u8 = 14;
--- a/kernel-hal-bare/src/arch/riscv/mod.rs
+++ b/kernel-hal-bare/src/arch/riscv/mod.rs
@ -1,630 +0,0 @@
-use super::super::*;
-use kernel_hal::{HalError, PageTableTrait, PhysAddr, VirtAddr};
-use riscv::addr::Page;
-use riscv::asm::sfence_vma_all;
-use riscv::paging::{PageTableFlags as PTF, *};
-use riscv::register::{satp, sie, stval, time};
-//use crate::sbi;
-use alloc::{collections::VecDeque, vec::Vec};
-use core::fmt::{self, Write};
-
-mod sbi;
-
-mod consts;
-
-use consts::PHYSICAL_MEMORY_OFFSET;
-
-// First core stores its SATP here.
-static mut SATP: usize = 0;
-
-/// remap kernel with 4K page
-pub fn remap_the_kernel(dtb: usize) {
-    let root_frame = Frame::alloc().expect("failed to alloc frame");
-    let root_vaddr = phys_to_virt(root_frame.paddr);
-    let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-    root.zero();
-    let mut pt = Rv39PageTable::new(root, PHYSICAL_MEMORY_OFFSET);
-
-    let linear_offset = PHYSICAL_MEMORY_OFFSET;
-    //let mut flags = PTF::VALID | PTF::READABLE | PTF::WRITABLE | PTF::EXECUTABLE | PTF::USER;
-
-    map_range(
-        &mut pt,
-        stext as usize,
-        etext as usize - 1,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::EXECUTABLE,
-    )
-    .unwrap();
-    map_range(
-        &mut pt,
-        srodata as usize,
-        erodata as usize,
-        linear_offset,
-        PTF::VALID | PTF::READABLE,
-    )
-    .unwrap();
-    map_range(
-        &mut pt,
-        sdata as usize,
-        edata as usize,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    // Stack
-    map_range(
-        &mut pt,
-        bootstack as usize,
-        bootstacktop as usize - 1,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    map_range(
-        &mut pt,
-        sbss as usize,
-        ebss as usize - 1,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    // Heap
-    map_range(
-        &mut pt,
-        end as usize,
-        end as usize + PAGE_SIZE * 512,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    // Device Tree
-    map_range(
-        &mut pt,
-        dtb,
-        dtb + consts::MAX_DTB_SIZE,
-        linear_offset,
-        PTF::VALID | PTF::READABLE,
-    )
-    .unwrap();
-
-    // CLINT
-    map_range(
-        &mut pt,
-        0x2000000 + PHYSICAL_MEMORY_OFFSET,
-        0x2010000 + PHYSICAL_MEMORY_OFFSET,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    // PLIC
-    map_range(
-        &mut pt,
-        0xc000000 + PHYSICAL_MEMORY_OFFSET,
-        0xc00f000 + PHYSICAL_MEMORY_OFFSET,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-    map_range(
-        &mut pt,
-        0xc200000 + PHYSICAL_MEMORY_OFFSET,
-        0xc20f000 + PHYSICAL_MEMORY_OFFSET,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    // UART0, VIRTIO
-    map_range(
-        &mut pt,
-        0x10000000 + PHYSICAL_MEMORY_OFFSET,
-        0x1000f000 + PHYSICAL_MEMORY_OFFSET,
-        linear_offset,
-        PTF::VALID | PTF::READABLE | PTF::WRITABLE,
-    )
-    .unwrap();
-
-    //写satp
-    let token = root_frame.paddr;
-    unsafe {
-        set_page_table(token);
-        SATP = token;
-    }
-
-    //use core::mem;
-    //mem::forget(pt);
-
-    info!("remap the kernel @ {:#x}", token);
-}
-
-pub fn map_range(
-    page_table: &mut Rv39PageTable,
-    mut start_addr: VirtAddr,
-    mut end_addr: VirtAddr,
-    linear_offset: usize,
-    flags: PageTableFlags,
-) -> Result<(), ()> {
-    trace!("Mapping range addr: {:#x} ~ {:#x}", start_addr, end_addr);
-
-    start_addr = start_addr & !(PAGE_SIZE - 1);
-    let mut start_page = start_addr / PAGE_SIZE;
-
-    //end_addr = (end_addr + PAGE_SIZE - 1) & !(PAGE_SIZE -1);
-    //let end_page = (end_addr - 1) / PAGE_SIZE;
-    end_addr = end_addr & !(PAGE_SIZE - 1);
-    let end_page = end_addr / PAGE_SIZE;
-
-    while start_page <= end_page {
-        let vaddr: VirtAddr = start_page * PAGE_SIZE;
-        let page = riscv::addr::Page::of_addr(riscv::addr::VirtAddr::new(vaddr));
-        let frame = riscv::addr::Frame::of_addr(riscv::addr::PhysAddr::new(vaddr - linear_offset));
-
-        start_page += 1;
-
-        trace!(
-            "map_range: {:#x} -> {:#x}, flags={:?}",
-            vaddr,
-            vaddr - linear_offset,
-            flags
-        );
-        page_table
-            .map_to(page, frame, flags, &mut FrameAllocatorImpl)
-            .unwrap()
-            .flush();
-    }
-    info!(
-        "map range from {:#x} to {:#x}, flags: {:?}",
-        start_addr,
-        end_page * PAGE_SIZE,
-        flags
-    );
-
-    Ok(())
-}
-
-extern "C" {
-    fn start();
-
-    fn stext();
-    fn etext();
-    fn srodata();
-    fn erodata();
-    fn sdata();
-    fn edata();
-
-    fn bootstack();
-    fn bootstacktop();
-
-    fn sbss();
-    fn ebss();
-
-    fn end();
-}
-
-/// Page Table
-#[repr(C)]
-pub struct PageTableImpl {
-    root_paddr: PhysAddr,
-}
-
-impl PageTableImpl {
-    /// Create a new `PageTable`.
-    #[allow(clippy::new_without_default)]
-    #[export_name = "hal_pt_new"]
-    pub fn new() -> Self {
-        let root_frame = Frame::alloc().expect("failed to alloc frame");
-        let root_vaddr = phys_to_virt(root_frame.paddr);
-        let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-        root.zero();
-
-        let current =
-            phys_to_virt(satp::read().frame().start_address().as_usize()) as *const PageTable;
-        map_kernel(root_vaddr as _, current as _);
-        trace!("create page table @ {:#x}", root_frame.paddr);
-        PageTableImpl {
-            root_paddr: root_frame.paddr,
-        }
-    }
-
-    #[cfg(target_arch = "riscv32")]
-    fn get(&mut self) -> Rv32PageTable<'_> {
-        let root_vaddr = phys_to_virt(self.root_paddr);
-        let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-        Rv32PageTable::new(root, phys_to_virt(0))
-    }
-
-    #[cfg(target_arch = "riscv64")]
-    fn get(&mut self) -> Rv39PageTable<'_> {
-        let root_vaddr = phys_to_virt(self.root_paddr);
-        let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-        Rv39PageTable::new(root, phys_to_virt(0))
-    }
-}
-
-impl PageTableTrait for PageTableImpl {
-    /// Map the page of `vaddr` to the frame of `paddr` with `flags`.
-    #[export_name = "hal_pt_map"]
-    fn map(&mut self, vaddr: VirtAddr, paddr: PhysAddr, flags: MMUFlags) -> Result<(), HalError> {
-        let mut pt = self.get();
-        let page = Page::of_addr(riscv::addr::VirtAddr::new(vaddr));
-        let frame = riscv::addr::Frame::of_addr(riscv::addr::PhysAddr::new(paddr));
-        pt.map_to(page, frame, flags.to_ptf(), &mut FrameAllocatorImpl)
-            .unwrap()
-            .flush();
-
-        debug!(
-            "PageTable: {:#X}, map: {:x?} -> {:x?}, flags={:?}",
-            self.table_phys() as usize,
-            vaddr,
-            paddr,
-            flags
-        );
-        Ok(())
-    }
-
-    /// Unmap the page of `vaddr`.
-    #[export_name = "hal_pt_unmap"]
-    fn unmap(&mut self, vaddr: VirtAddr) -> Result<(), HalError> {
-        let mut pt = self.get();
-        let page = Page::of_addr(riscv::addr::VirtAddr::new(vaddr));
-        pt.unmap(page).unwrap().1.flush();
-        trace!(
-            "PageTable: {:#X}, unmap: {:x?}",
-            self.table_phys() as usize,
-            vaddr
-        );
-        Ok(())
-    }
-
-    /// Change the `flags` of the page of `vaddr`.
-    #[export_name = "hal_pt_protect"]
-    fn protect(&mut self, vaddr: VirtAddr, flags: MMUFlags) -> Result<(), HalError> {
-        let mut pt = self.get();
-        let page = Page::of_addr(riscv::addr::VirtAddr::new(vaddr));
-        pt.update_flags(page, flags.to_ptf()).unwrap().flush();
-
-        if vaddr == 0x11b000 {
-            info!("protect 0x11b3c0: {:#X?}", self.query(0x11b3c0));
-        } else if vaddr == 0xc4000 {
-            info!("protect 0xc44b6: {:#X?}", self.query(0xc44b6));
-        }
-        trace!(
-            "PageTable: {:#X}, protect: {:x?}, flags={:?}",
-            self.table_phys() as usize,
-            vaddr,
-            flags
-        );
-        Ok(())
-    }
-
-    /// Query the physical address which the page of `vaddr` maps to.
-    #[export_name = "hal_pt_query"]
-    fn query(&mut self, vaddr: VirtAddr) -> Result<PhysAddr, HalError> {
-        let mut pt = self.get();
-        let page = Page::of_addr(riscv::addr::VirtAddr::new(vaddr));
-        let res = pt.ref_entry(page);
-        trace!("query: {:x?} => {:#x?}", vaddr, res);
-        match res {
-            Ok(entry) => Ok(entry.addr().as_usize()),
-            Err(_) => Err(HalError),
-        }
-    }
-
-    /// Get the physical address of root page table.
-    #[export_name = "hal_pt_table_phys"]
-    fn table_phys(&self) -> PhysAddr {
-        self.root_paddr
-    }
-
-    /// Activate this page table
-    #[export_name = "hal_pt_activate"]
-    fn activate(&self) {
-        let now_token = satp::read().bits();
-        let new_token = self.table_phys();
-        if now_token != new_token {
-            debug!("switch table {:x?} -> {:x?}", now_token, new_token);
-            unsafe {
-                set_page_table(new_token);
-            }
-        }
-    }
-}
-
-pub unsafe fn set_page_table(vmtoken: usize) {
-    #[cfg(target_arch = "riscv32")]
-    let mode = satp::Mode::Sv32;
-    #[cfg(target_arch = "riscv64")]
-    let mode = satp::Mode::Sv39;
-    debug!("set user table: {:#x?}", vmtoken);
-    satp::set(mode, 0, vmtoken >> 12);
-    //刷TLB好像很重要
-    sfence_vma_all();
-}
-
-trait FlagsExt {
-    fn to_ptf(self) -> PTF;
-}
-
-impl FlagsExt for MMUFlags {
-    fn to_ptf(self) -> PTF {
-        let mut flags = PTF::VALID;
-        if self.contains(MMUFlags::READ) {
-            flags |= PTF::READABLE;
-        }
-        if self.contains(MMUFlags::WRITE) {
-            flags |= PTF::WRITABLE;
-        }
-        if self.contains(MMUFlags::EXECUTE) {
-            flags |= PTF::EXECUTABLE;
-        }
-        if self.contains(MMUFlags::USER) {
-            flags |= PTF::USER;
-        }
-        flags
-    }
-}
-
-struct FrameAllocatorImpl;
-
-impl FrameAllocator for FrameAllocatorImpl {
-    fn alloc(&mut self) -> Option<riscv::addr::Frame> {
-        Frame::alloc().map(|f| {
-            let paddr = riscv::addr::PhysAddr::new(f.paddr);
-            riscv::addr::Frame::of_addr(paddr)
-        })
-    }
-}
-
-impl FrameDeallocator for FrameAllocatorImpl {
-    fn dealloc(&mut self, frame: riscv::addr::Frame) {
-        Frame {
-            paddr: frame.start_address().as_usize(),
-        }
-        .dealloc()
-    }
-}
-
-lazy_static! {
-    static ref STDIN: Mutex<VecDeque<u8>> = Mutex::new(VecDeque::new());
-    static ref STDIN_CALLBACK: Mutex<Vec<Box<dyn Fn() -> bool + Send + Sync>>> =
-        Mutex::new(Vec::new());
-}
-
-//调用这里
-/// Put a char by serial interrupt handler.
-fn serial_put(mut x: u8) {
-    if x == b'\r' {
-        x = b'\n';
-    }
-    STDIN.lock().push_back(x);
-    STDIN_CALLBACK.lock().retain(|f| !f());
-}
-
-#[export_name = "hal_serial_set_callback"]
-pub fn serial_set_callback(callback: Box<dyn Fn() -> bool + Send + Sync>) {
-    STDIN_CALLBACK.lock().push(callback);
-}
-
-#[export_name = "hal_serial_read"]
-pub fn serial_read(buf: &mut [u8]) -> usize {
-    let mut stdin = STDIN.lock();
-    let len = stdin.len().min(buf.len());
-    for c in &mut buf[..len] {
-        *c = stdin.pop_front().unwrap();
-    }
-    len
-}
-
-#[export_name = "hal_serial_write"]
-pub fn serial_write(s: &str) {
-    //putfmt(format_args!("{}", s));
-    putfmt_uart(format_args!("{}", s));
-}
-
-// Get TSC frequency.
-fn tsc_frequency() -> u16 {
-    const DEFAULT: u16 = 2600;
-
-    // FIXME: QEMU, AMD, VirtualBox
-    DEFAULT
-}
-
-#[export_name = "hal_apic_local_id"]
-pub fn apic_local_id() -> u8 {
-    let lapic = 0;
-    lapic as u8
-}
-
-////////////
-
-pub fn getchar_option() -> Option<u8> {
-    let c = sbi::console_getchar() as isize;
-    match c {
-        -1 => None,
-        c => Some(c as u8),
-    }
-}
-
-////////////
-
-pub fn putchar(ch: char) {
-    sbi::console_putchar(ch as u8 as usize);
-}
-
-pub fn puts(s: &str) {
-    for ch in s.chars() {
-        putchar(ch);
-    }
-}
-
-struct Stdout;
-
-impl fmt::Write for Stdout {
-    fn write_str(&mut self, s: &str) -> fmt::Result {
-        puts(s);
-        Ok(())
-    }
-}
-
-pub fn putfmt(fmt: fmt::Arguments) {
-    Stdout.write_fmt(fmt).unwrap();
-}
-////////////
-
-struct Stdout1;
-impl fmt::Write for Stdout1 {
-    fn write_str(&mut self, s: &str) -> fmt::Result {
-        //每次都创建一个新的Uart ? 内存位置始终相同
-        write!(
-            uart::Uart::new(0x1000_0000 + PHYSICAL_MEMORY_OFFSET),
-            "{}",
-            s
-        )
-        .unwrap();
-
-        Ok(())
-    }
-}
-pub fn putfmt_uart(fmt: fmt::Arguments) {
-    Stdout1.write_fmt(fmt).unwrap();
-}
-
-////////////
-
-#[macro_export]
-macro_rules! bare_print {
-	($($arg:tt)*) => ({
-        putfmt(format_args!($($arg)*));
-	});
-}
-
-#[macro_export]
-macro_rules! bare_println {
-	() => (bare_print!("\n"));
-	($($arg:tt)*) => (bare_print!("{}\n", format_args!($($arg)*)));
-}
-
-pub const MMIO_MTIMECMP0: *mut u64 = 0x0200_4000usize as *mut u64;
-pub const MMIO_MTIME: *const u64 = 0x0200_BFF8 as *const u64;
-
-fn get_cycle() -> u64 {
-    time::read() as u64
-    /*
-    unsafe {
-        MMIO_MTIME.read_volatile()
-    }
-    */
-}
-
-#[export_name = "hal_timer_now"]
-pub fn timer_now() -> Duration {
-    const FREQUENCY: u64 = 10_000_000; // ???
-    let time = get_cycle();
-    //bare_println!("timer_now(): {:?}", time);
-    Duration::from_nanos(time * 1_000_000_000 / FREQUENCY as u64)
-}
-
-#[export_name = "hal_timer_set_next"]
-fn timer_set_next() {
-    //let TIMEBASE: u64 = 100000;
-    let TIMEBASE: u64 = 10_000_000;
-    sbi::set_timer(get_cycle() + TIMEBASE);
-}
-
-fn timer_init() {
-    unsafe {
-        sie::set_stimer();
-    }
-    timer_set_next();
-}
-
-pub fn init(config: Config) {
-    interrupt::init();
-    timer_init();
-
-    /*
-    interrupt::init_soft();
-    sbi::send_ipi(0);
-    */
-
-    unsafe {
-        llvm_asm!("ebreak"::::"volatile");
-    }
-
-    bare_println!("Setup virtio @devicetree {:#x}", config.dtb);
-    //virtio::init(config.dtb);
-
-    virtio::device_tree::init(config.dtb);
-}
-
-pub struct Config {
-    pub mconfig: u64,
-    pub dtb: usize,
-}
-
-#[export_name = "fetch_fault_vaddr"]
-pub fn fetch_fault_vaddr() -> VirtAddr {
-    stval::read() as _
-}
-
-static mut CONFIG: Config = Config { mconfig: 0, dtb: 0 };
-
-/// This structure represents the information that the bootloader passes to the kernel.
-#[repr(C)]
-#[derive(Debug)]
-pub struct BootInfo {
-    pub memory_map: Vec<u64>,
-    //pub memory_map: Vec<&'static MemoryDescriptor>,
-    /// The offset into the virtual address space where the physical memory is mapped.
-    pub physical_memory_offset: u64,
-    /// The graphic output information
-    pub graphic_info: GraphicInfo,
-
-    /// Physical address of ACPI2 RSDP, 启动的系统信息表的入口指针
-    //pub acpi2_rsdp_addr: u64,
-    /// Physical address of SMBIOS, 产品管理信息的结构表
-    //pub smbios_addr: u64,
-    pub hartid: u64,
-    pub dtb_addr: u64,
-
-    /// The start physical address of initramfs
-    pub initramfs_addr: u64,
-    /// The size of initramfs
-    pub initramfs_size: u64,
-    /// Kernel command line
-    pub cmdline: &'static str,
-}
-
-/// Graphic output information
-#[derive(Debug, Copy, Clone)]
-#[repr(C)]
-pub struct GraphicInfo {
-    /// Graphic mode
-    //pub mode: ModeInfo,
-    pub mode: u64,
-    /// Framebuffer base physical address
-    pub fb_addr: u64,
-    /// Framebuffer size
-    pub fb_size: u64,
-}
-
-pub mod interrupt;
-mod plic;
-mod uart;
-
-pub mod virtio;
-
-#[export_name = "hal_current_pgtable"]
-pub fn current_page_table() -> usize {
-    #[cfg(target_arch = "riscv32")]
-    let mode = satp::Mode::Sv32;
-    #[cfg(target_arch = "riscv64")]
-    let mode = satp::Mode::Sv39;
-    satp::read().ppn() << 12
-}
--- a/kernel-hal-bare/src/arch/riscv/plic.rs
+++ b/kernel-hal-bare/src/arch/riscv/plic.rs
@ -1,137 +0,0 @@
-use super::consts::PHYSICAL_MEMORY_OFFSET;
-use super::interrupt;
-use super::uart;
-use crate::putfmt; //For bare_println
-
-const MMODE: usize = 0;
-
-// k210
-//const MMODE: usize = 1;
-
-//通过MMIO地址对平台级中断控制器PLIC的寄存器进行设置
-//
-//Source 1 priority: 0x0c000004
-//Source 2 priority: 0x0c000008
-const PLIC_PRIORITY: usize = 0x0c00_0000 + PHYSICAL_MEMORY_OFFSET;
-//Pending 32位寄存器，每一位标记一个中断源ID
-const PLIC_PENDING: usize = 0x0c00_1000 + PHYSICAL_MEMORY_OFFSET;
-
-//Target 0 threshold: 0x0c200000
-//Target 0 claim    : 0x0c200004
-//
-//Target 1 threshold: 0x0c201000 *
-//Target 1 claim    : 0x0c201004 *
-
-const PLIC_THRESHOLD: usize = if MMODE == 1 {
-    0x0c200000 + PHYSICAL_MEMORY_OFFSET
-} else {
-    0x0c201000 + PHYSICAL_MEMORY_OFFSET
-};
-const PLIC_CLAIM: usize = if MMODE == 1 {
-    0x0c200004 + PHYSICAL_MEMORY_OFFSET
-} else {
-    0x0c201004 + PHYSICAL_MEMORY_OFFSET
-};
-
-//注意一个核的不同权限模式是不同Target
-//Target: 0  1  2        3  4  5
-// Hart0: M  S  U Hart1: M  S  U
-//
-//target 0 enable: 0x0c002000
-//target 1 enable: 0x0c002080 *
-const PLIC_INT_ENABLE: usize = if MMODE == 1 {
-    0x0c002000 + PHYSICAL_MEMORY_OFFSET
-} else {
-    0x0c002080 + PHYSICAL_MEMORY_OFFSET
-}; //基于opensbi后一般运行于Hart0 S态，故为Target1
-
-//PLIC是async cause 11
-//声明claim会清除中断源上的相应pending位。
-//即使mip寄存器的MEIP位没有置位, 也可以claim; 声明不被阀值寄存器的设置影响；
-//获取按优先级排序后的下一个可用的中断ID
-pub fn next() -> Option<u32> {
-    let claim_reg = PLIC_CLAIM as *const u32;
-    let claim_no;
-    unsafe {
-        claim_no = claim_reg.read_volatile();
-    }
-    if claim_no == 0 {
-        None //没有可用中断待定
-    } else {
-        Some(claim_no)
-    }
-}
-
-//claim时，PLIC不再从该相同设备监听中断
-//写claim寄存器，告诉PLIC处理完成该中断
-// id 应该来源于next()函数
-pub fn complete(id: u32) {
-    let complete_reg = PLIC_CLAIM as *mut u32; //和claim相同寄存器,只是读或写的区别
-    unsafe {
-        complete_reg.write_volatile(id);
-    }
-}
-
-//看的中断ID是否pending
-pub fn is_pending(id: u32) -> bool {
-    let pend = PLIC_PENDING as *const u32;
-    let actual_id = 1 << id;
-    let pend_ids;
-    unsafe {
-        pend_ids = pend.read_volatile();
-    }
-    actual_id & pend_ids != 0
-}
-
-//使能target中某个给定ID的中断
-//中断ID可查找qemu/include/hw/riscv/virt.h, 如：UART0_IRQ = 10
-pub fn enable(id: u32) {
-    let enables = PLIC_INT_ENABLE as *mut u32; //32位的寄存器
-    let actual_id = 1 << id;
-    unsafe {
-        enables.write_volatile(enables.read_volatile() | actual_id);
-        // 0x0c00_2000 <=~ (1 << 10)
-    }
-}
-
-//设置中断源的优先级，分0～7级，7是最高级, eg:这里id=10, 表示第10个中断源的设置, prio=1
-pub fn set_priority(id: u32, prio: u8) {
-    let actual_prio = prio as u32 & 7;
-    let prio_reg = PLIC_PRIORITY as *mut u32;
-    unsafe {
-        prio_reg.add(id as usize).write_volatile(actual_prio); //0x0c000000 + 4 * 10 <= 1 = 1 & 7
-    }
-}
-
-//设置中断target的全局阀值［0..7]， <= threshold会被屏蔽
-pub fn set_threshold(tsh: u8) {
-    let actual_tsh = tsh & 7; //使用0b111保留最后三位
-    let tsh_reg = PLIC_THRESHOLD as *mut u32;
-    unsafe {
-        tsh_reg.write_volatile(actual_tsh as u32); // 0x0c20_0000 <= 0 = 0 & 7
-    }
-}
-
-pub fn handle_interrupt() {
-    if let Some(interrupt) = next() {
-        match interrupt {
-            1..=8 => {
-                //virtio::handle_interrupt(interrupt);
-                bare_println!("plic virtio external interrupt: {}", interrupt);
-            }
-            10 => {
-                //UART中断ID是10
-                uart::handle_interrupt();
-
-                //换用sbi的方式获取字符
-                //interrupt::try_process_serial();
-            }
-            _ => {
-                bare_println!("Unknown external interrupt: {}", interrupt);
-            }
-        }
-        //这将复位pending的中断，允许UART再次中断。
-        //否则，UART将被“卡住”
-        complete(interrupt);
-    }
-}
--- a/kernel-hal-bare/src/arch/riscv/sbi.rs
+++ b/kernel-hal-bare/src/arch/riscv/sbi.rs
@ -1,45 +0,0 @@
-pub fn console_putchar(ch: usize) {
-    sbi_call(SBI_CONSOLE_PUTCHAR, ch, 0, 0);
-}
-
-pub fn console_getchar() -> usize {
-    return sbi_call(SBI_CONSOLE_GETCHAR, 0, 0, 0);
-}
-
-fn sbi_call(which: usize, arg0: usize, arg1: usize, arg2: usize) -> usize {
-    let ret: usize;
-    unsafe {
-        llvm_asm!("ecall"
-		     :"={x10}"(ret)
-		     :"{x10}"(arg0), "{x11}"(arg1), "{x12}"(arg2), "{x17}"(which)
-		     :"memory"
-		     :"volatile");
-    }
-    ret
-}
-
-pub fn set_timer(stime_value: u64) {
-    #[cfg(target_pointer_width = "32")]
-    sbi_call(SBI_SET_TIMER, stime_value as usize, (stime_value >> 32), 0);
-
-    #[cfg(target_pointer_width = "64")]
-    sbi_call(SBI_SET_TIMER, stime_value as usize, 0, 0);
-}
-
-pub fn clear_ipi() {
-    sbi_call(SBI_CLEAR_IPI, 0, 0, 0);
-}
-
-pub fn send_ipi(sipi_value: usize) {
-    sbi_call(SBI_SEND_IPI, sipi_value, 0, 0);
-}
-
-const SBI_SET_TIMER: usize = 0;
-const SBI_CONSOLE_PUTCHAR: usize = 1;
-const SBI_CONSOLE_GETCHAR: usize = 2;
-const SBI_CLEAR_IPI: usize = 3;
-const SBI_SEND_IPI: usize = 4;
-const SBI_REMOTE_FENCE_I: usize = 5;
-const SBI_REMOTE_SFENCE_VMA: usize = 6;
-const SBI_REMOTE_SFENCE_VMA_ASID: usize = 7;
-const SBI_SHUTDOWN: usize = 8;
--- a/kernel-hal-bare/src/arch/riscv/trap.asm
+++ b/kernel-hal-bare/src/arch/riscv/trap.asm
@ -1,130 +0,0 @@
-.equ XLENB, 8
-# sp + 8*a2 -> a1
-.macro LOAD a1, a2
-	ld \a1, \a2*XLENB(sp)
-.endm
-
-.macro STORE a1, a2
-	sd \a1, \a2*XLENB(sp)
-.endm
-
-# int in U: sscratch = kernel_addr; int in S: sscratch = 0;
-.macro SAVE_ALL
-	csrrw sp, sscratch, sp
-
-	bnez sp, trap_from_user
-trap_from_kernel:
-	csrr sp, sscratch
-trap_from_user:
-	addi sp, sp, -36*XLENB
-
-# x0 = 0, x2 = sp
-	STORE x1, 1
-	STORE x3, 3
-	STORE x4, 4
-	STORE x5, 5
-	STORE x6, 6
-	STORE x7, 7
-	STORE x8, 8
-	STORE x9, 9
-	STORE x10, 10
-	STORE x11, 11
-	STORE x12, 12
-	STORE x13, 13
-	STORE x14, 14
-	STORE x15, 15
-	STORE x16, 16
-	STORE x17, 17
-	STORE x18, 18
-	STORE x19, 19
-	STORE x20, 20
-	STORE x21, 21
-	STORE x22, 22
-	STORE x23, 23
-	STORE x24, 24
-	STORE x25, 25
-	STORE x26, 26
-	STORE x27, 27
-	STORE x28, 28
-	STORE x29, 29
-	STORE x30, 30
-	STORE x31, 31
-
-	csrrw s0, sscratch, x0
-
-	csrr s1, sstatus
-	csrr s2, sepc
-	csrr s3, stval
-	csrr s4, scause
-
-	STORE s0, 2
-	STORE s1, 32
-	STORE s2, 33
-	STORE s3, 34
-	STORE s4, 35
-.endm
-
-.macro RESTORE_ALL
-
-	# s1 = sstatus, s2 = sepc
-	LOAD s1, 32
-	LOAD s2, 33
-
-	# int in Kernel, sstatus SPP = 1; int in User, sstatus SPP 0
-	andi s0, s1, 1 << 8
-	bnez s0, _to_kernel
-_to_user:
-	addi s0, sp, 36 * XLENB
-	csrw sscratch, s0
-_to_kernel:
-	csrw sstatus, s1
-	csrw sepc, s2
-
-	
-	LOAD x1, 1
-	LOAD x3, 3
-	LOAD x4, 4
-	LOAD x5, 5
-	LOAD x6, 6
-	LOAD x7, 7
-	LOAD x8, 8
-	LOAD x9, 9
-	LOAD x10, 10
-	LOAD x11, 11
-	LOAD x12, 12
-	LOAD x13, 13
-	LOAD x14, 14
-	LOAD x15, 15
-	LOAD x16, 16
-	LOAD x17, 17
-	LOAD x18, 18
-	LOAD x19, 19
-	LOAD x20, 20
-	LOAD x21, 21
-	LOAD x22, 22
-	LOAD x23, 23
-	LOAD x24, 24
-	LOAD x25, 25
-	LOAD x26, 26
-	LOAD x27, 27
-	LOAD x28, 28
-	LOAD x29, 29
-	LOAD x30, 30
-	LOAD x31, 31
-
-	# sp
-	LOAD x2, 2
-.endm
-
-	.section .text
-	.globl __alltraps
-	.align 4
-__alltraps:
-	SAVE_ALL
-	mv a0, sp
-	jal rust_trap
-
-	.globl __trapret
-__trapret:
-	RESTORE_ALL
-	sret
--- a/kernel-hal-bare/src/arch/riscv/uart.rs
+++ b/kernel-hal-bare/src/arch/riscv/uart.rs
@ -1,151 +0,0 @@
-use super::consts::PHYSICAL_MEMORY_OFFSET;
-use crate::putfmt;
-use core::convert::TryInto;
-use core::fmt::{Error, Write};
-
-//use crate::console::push_stdin;
-
-pub struct Uart {
-    base_address: usize,
-}
-
-// 结构体Uart的实现块
-impl Uart {
-    pub fn new(base_address: usize) -> Self {
-        Uart { base_address }
-    }
-    /*
-    uart初始化
-    设置字长为8-bits (LCR[1:0])
-    使能先进先出FIFOs (FCR[0])
-    使能接受中断(IER[0]), 在这只使用轮询的方式而不用中断
-
-    */
-    pub fn init(&mut self) {
-        let ptr = self.base_address as *mut u8;
-        unsafe {
-            // LCR at base_address + 3
-            // 置位     bit 0      bit 1
-            let lcr = (1 << 0) | (1 << 1);
-            ptr.add(3).write_volatile(lcr);
-
-            // FCR at offset 2
-            ptr.add(2).write_volatile(1 << 0);
-
-            //IER at offset 1
-            ptr.add(1).write_volatile(1 << 0);
-
-            // 设置波特率，除子，取整等
-            // 2.729 MHz (22,729,000 cycles per second) --> 波特率 2400 (BAUD)
-
-            // 根据NS16550a规格说明书计算出divisor
-            // divisor = ceil( (clock_hz) / (baud_sps x 16) )
-            // divisor = ceil( 22_729_000 / (2400 x 16) ) = ceil( 591.901 ) = 592
-
-            // divisor寄存器是16 bits
-            let divisor: u16 = 592;
-            //let divisor_least: u8 = divisor & 0xff;
-            //let divisor_most:  u8 = divisor >> 8;
-            let divisor_least: u8 = (divisor & 0xff).try_into().unwrap();
-            let divisor_most: u8 = (divisor >> 8).try_into().unwrap();
-
-            // DLL和DLM会与其它寄存器共用基地址，需要设置DLAB来切换选择寄存器
-            // LCR base_address + 3, DLAB = 1
-            ptr.add(3).write_volatile(lcr | 1 << 7);
-
-            //写DLL和DLM来设置波特率, 把频率22.729 MHz的时钟划分为每秒2400个信号
-            ptr.add(0).write_volatile(divisor_least);
-            ptr.add(1).write_volatile(divisor_most);
-
-            // 设置后不需要再动了, 清空DLAB
-            ptr.add(3).write_volatile(lcr);
-        }
-    }
-
-    pub fn simple_init(&mut self) {
-        let ptr = self.base_address as *mut u8;
-        unsafe {
-            // Enable FIFO; (base + 2)
-            ptr.add(2).write_volatile(0xC7);
-
-            // MODEM Ctrl; (base + 4)
-            ptr.add(4).write_volatile(0x0B);
-
-            // Enable interrupts; (base + 1)
-            ptr.add(1).write_volatile(0x01);
-        }
-    }
-
-    pub fn get(&mut self) -> Option<u8> {
-        let ptr = self.base_address as *mut u8;
-        unsafe {
-            //查看LCR, DR位为1则有数据
-            if ptr.add(5).read_volatile() & 0b1 == 0 {
-                None
-            } else {
-                Some(ptr.add(0).read_volatile())
-            }
-        }
-    }
-
-    pub fn put(&mut self, c: u8) {
-        let ptr = self.base_address as *mut u8;
-        unsafe {
-            //此时transmitter empty
-            ptr.add(0).write_volatile(c);
-        }
-    }
-}
-
-// 需要实现的write_str()重要函数
-impl Write for Uart {
-    fn write_str(&mut self, out: &str) -> Result<(), Error> {
-        for c in out.bytes() {
-            self.put(c);
-        }
-        Ok(())
-    }
-}
-
-/*
-fn unsafe mmio_write(address: usize, offset: usize, value: u8) {
-    //write_volatile() 是 *mut raw 的成员；
-    //new_pointer = old_pointer + sizeof(pointer_type) * offset
-    //也可使用reg.offset
-
-    let reg = address as *mut u8;
-    reg.add(offset).write_volatile(value);
-}
-
-fn unsafe mmio_read(address: usize, offset: usize, value: u8) -> u8 {
-
-    let reg = address as *mut u8;
-
-    //读取8 bits
-    reg.add(offset).read_volatile(value) //无分号可直接返回值
-}
-*/
-
-pub fn handle_interrupt() {
-    let mut my_uart = Uart::new(0x1000_0000 + PHYSICAL_MEMORY_OFFSET);
-    if let Some(c) = my_uart.get() {
-        //CONSOLE
-        //push_stdin(c);
-        super::serial_put(c);
-
-        /*
-         * 因serial_write()已可以被回调输出了，这里则不再需要了
-        match c {
-            0x7f => { //0x8 [backspace] ; 而实际qemu运行，[backspace]键输出0x7f, 表示del
-                bare_print!("{} {}", 8 as char, 8 as char);
-            },
-            10 | 13 => { // 新行或回车
-                bare_println!();
-            },
-            _ => {
-                bare_print!("{}", c as char);
-            },
-        }
-        */
-    }
-}
--- a/kernel-hal-bare/src/arch/riscv/virtio/device_tree.rs
+++ b/kernel-hal-bare/src/arch/riscv/virtio/device_tree.rs
@ -1,48 +0,0 @@
-use alloc::string::String;
-use core::slice;
-
-use device_tree::{DeviceTree, Node};
-
-//use super::virtio_mmio::virtio_probe;
-use super::virtio::virtio_probe;
-use super::CMDLINE;
-
-const DEVICE_TREE_MAGIC: u32 = 0xd00dfeed;
-
-fn walk_dt_node(dt: &Node) {
-    if let Ok(compatible) = dt.prop_str("compatible") {
-        // TODO: query this from table
-        if compatible == "virtio,mmio" {
-            virtio_probe(dt);
-        }
-        // TODO: initial other devices (16650, etc.)
-    }
-    if let Ok(bootargs) = dt.prop_str("bootargs") {
-        if bootargs.len() > 0 {
-            info!("Kernel cmdline: {}", bootargs);
-            *CMDLINE.write() = String::from(bootargs);
-        }
-    }
-    for child in dt.children.iter() {
-        walk_dt_node(child);
-    }
-}
-
-struct DtbHeader {
-    magic: u32,
-    size: u32,
-}
-
-pub fn init(dtb: usize) {
-    info!("DTB: {:#x}", dtb);
-    let header = unsafe { &*(dtb as *const DtbHeader) };
-    let magic = u32::from_be(header.magic);
-    if magic == DEVICE_TREE_MAGIC {
-        let size = u32::from_be(header.size);
-        let dtb_data = unsafe { slice::from_raw_parts(dtb as *const u8, size as usize) };
-        if let Ok(dt) = DeviceTree::load(dtb_data) {
-            //trace!("DTB: {:#x?}", dt);
-            walk_dt_node(&dt.root);
-        }
-    }
-}
--- a/kernel-hal-bare/src/arch/riscv/virtio/mod.rs
+++ b/kernel-hal-bare/src/arch/riscv/virtio/mod.rs
@ -1,104 +0,0 @@
-use alloc::string::String;
-use alloc::sync::Arc;
-use alloc::vec::Vec;
-use lazy_static::lazy_static;
-use rcore_fs::dev::{self, BlockDevice, DevError};
-use spin::RwLock;
-
-//pub use block::BlockDriver;
-
-/// Block device
-pub mod virtio;
-
-/// Device tree
-pub mod device_tree;
-
-#[derive(Debug, Eq, PartialEq)]
-pub enum DeviceType {
-    Net,
-    Gpu,
-    Input,
-    Block,
-    Rtc,
-    Serial,
-    Intc,
-}
-
-pub trait Driver: Send + Sync {
-    // if interrupt belongs to this driver, handle it and return true
-    // return false otherwise
-    // irq number is provided when available
-    // driver should skip handling when irq number is mismatched
-    fn try_handle_interrupt(&self, irq: Option<usize>) -> bool;
-
-    // return the correspondent device type, see DeviceType
-    fn device_type(&self) -> DeviceType;
-
-    // get unique identifier for this device
-    // should be different for each instance
-    fn get_id(&self) -> String;
-
-    // trait casting
-    /*
-    fn as_net(&self) -> Option<&dyn NetDriver> {
-        None
-    }
-    */
-
-    fn as_block(&self) -> Option<&dyn BlockDriver> {
-        None
-    }
-
-    /*
-    fn as_rtc(&self) -> Option<&dyn RtcDriver> {
-        None
-    }
-    */
-}
-
-/////////
-pub trait BlockDriver: Driver {
-    fn read_block(&self, _block_id: usize, _buf: &mut [u8]) -> bool {
-        unimplemented!("not a block driver")
-    }
-
-    fn write_block(&self, _block_id: usize, _buf: &[u8]) -> bool {
-        unimplemented!("not a block driver")
-    }
-}
-/////////
-
-lazy_static! {
-    // NOTE: RwLock only write when initializing drivers
-    pub static ref DRIVERS: RwLock<Vec<Arc<dyn Driver>>> = RwLock::new(Vec::new());
-    pub static ref BLK_DRIVERS: RwLock<Vec<Arc<dyn BlockDriver>>> = RwLock::new(Vec::new());
-    //pub static ref IRQ_MANAGER: RwLock<irq::IrqManager> = RwLock::new(irq::IrqManager::new(true));
-}
-
-pub struct BlockDriverWrapper(pub Arc<dyn BlockDriver>);
-
-impl BlockDevice for BlockDriverWrapper {
-    const BLOCK_SIZE_LOG2: u8 = 9; // 512
-    fn read_at(&self, block_id: usize, buf: &mut [u8]) -> dev::Result<()> {
-        match self.0.read_block(block_id, buf) {
-            true => Ok(()),
-            false => Err(DevError),
-        }
-    }
-
-    fn write_at(&self, block_id: usize, buf: &[u8]) -> dev::Result<()> {
-        match self.0.write_block(block_id, buf) {
-            true => Ok(()),
-            false => Err(DevError),
-        }
-    }
-
-    fn sync(&self) -> dev::Result<()> {
-        Ok(())
-    }
-}
-
-lazy_static! {
-    // Write only once at boot
-    pub static ref CMDLINE: RwLock<String> = RwLock::new(String::new());
-}
--- a/kernel-hal-bare/src/arch/riscv/virtio/virtio.rs
+++ b/kernel-hal-bare/src/arch/riscv/virtio/virtio.rs
@ -1,130 +0,0 @@
-use crate::{frame_dealloc, hal_frame_alloc_contiguous, phys_to_virt, virt_to_phys, PAGE_SIZE};
-use device_tree::util::SliceRead;
-use device_tree::Node;
-use log::*;
-use virtio_drivers::{VirtIOBlk, VirtIOHeader};
-
-use super::super::PHYSICAL_MEMORY_OFFSET;
-
-pub fn virtio_probe(node: &Node) {
-    let reg = match node.prop_raw("reg") {
-        Some(reg) => reg,
-        _ => return,
-    };
-    let paddr = reg.as_slice().read_be_u64(0).unwrap();
-    //let vaddr = phys_to_virt(paddr as usize);
-    let size = reg.as_slice().read_be_u64(8).unwrap();
-    // assuming one page
-    assert_eq!(size as usize, PAGE_SIZE);
-
-    /* 一一映射
-    let vaddr = paddr;
-    unsafe{
-        PageTableImpl::active().map_if_not_exists(vaddr as usize, paddr as usize);
-    }
-    */
-    let vaddr = paddr + PHYSICAL_MEMORY_OFFSET as u64;
-
-    debug!("virtio_probe, paddr:{:#x}, vaddr:{:#x}", paddr, vaddr);
-
-    let header = unsafe { &mut *(vaddr as *mut VirtIOHeader) };
-    if !header.verify() {
-        // only support legacy device
-        return;
-    }
-    info!(
-        "Detected virtio device with vendor id: {:#X}",
-        header.vendor_id()
-    );
-    info!("Device tree node {:?}", node);
-    match header.device_type() {
-        //DeviceType::Network => virtio_net::init(header),
-        virtio_drivers::DeviceType::Block => virtio_blk_init(header),
-        t => warn!("Unrecognized virtio device: {:?}", t),
-    }
-}
-
-/// virtio_mmio
-/////////
-/// virtio_blk
-use alloc::string::String;
-use alloc::sync::Arc;
-
-use alloc::format;
-
-use super::{BlockDriver, DeviceType, Driver, BLK_DRIVERS, DRIVERS};
-
-//use crate::{sync::SpinNoIrqLock as Mutex};
-use spin::Mutex;
-
-struct VirtIOBlkDriver(Mutex<VirtIOBlk<'static>>);
-
-impl Driver for VirtIOBlkDriver {
-    fn try_handle_interrupt(&self, _irq: Option<usize>) -> bool {
-        self.0.lock().ack_interrupt()
-    }
-
-    fn device_type(&self) -> DeviceType {
-        DeviceType::Block
-    }
-
-    fn get_id(&self) -> String {
-        format!("virtio_block")
-    }
-
-    fn as_block(&self) -> Option<&dyn BlockDriver> {
-        None
-    }
-}
-
-impl BlockDriver for VirtIOBlkDriver {
-    fn read_block(&self, block_id: usize, buf: &mut [u8]) -> bool {
-        self.0.lock().read_block(block_id, buf).is_ok()
-    }
-
-    fn write_block(&self, block_id: usize, buf: &[u8]) -> bool {
-        self.0.lock().write_block(block_id, buf).is_ok()
-    }
-}
-
-pub fn virtio_blk_init(header: &'static mut VirtIOHeader) {
-    let blk = VirtIOBlk::new(header).expect("failed to init blk driver");
-    let driver = Arc::new(VirtIOBlkDriver(Mutex::new(blk)));
-    DRIVERS.write().push(driver.clone());
-    //IRQ_MANAGER.write().register_all(driver.clone());
-    BLK_DRIVERS.write().push(driver);
-}
-
-/////////
-/// virtio dma alloc/dealloc
-
-#[no_mangle]
-extern "C" fn virtio_dma_alloc(pages: usize) -> PhysAddr {
-    let paddr = unsafe { hal_frame_alloc_contiguous(pages, 0).unwrap() };
-    trace!("alloc DMA: paddr={:#x}, pages={}", paddr, pages);
-    paddr
-}
-
-#[no_mangle]
-extern "C" fn virtio_dma_dealloc(paddr: PhysAddr, pages: usize) -> i32 {
-    for i in 0..pages {
-        unsafe {
-            frame_dealloc(&(paddr + i * PAGE_SIZE));
-        }
-    }
-    trace!("dealloc DMA: paddr={:#x}, pages={}", paddr, pages);
-    0
-}
-
-#[no_mangle]
-extern "C" fn virtio_phys_to_virt(paddr: PhysAddr) -> VirtAddr {
-    phys_to_virt(paddr)
-}
-
-#[no_mangle]
-extern "C" fn virtio_virt_to_phys(vaddr: VirtAddr) -> PhysAddr {
-    virt_to_phys(vaddr)
-}
-
-type VirtAddr = usize;
-type PhysAddr = usize;
--- a/kernel-hal-bare/src/arch/x86_64/acpi_table.rs
+++ b/kernel-hal-bare/src/arch/x86_64/acpi_table.rs
@ -1,77 +0,0 @@
-#![allow(dead_code)]
-use crate::get_acpi_table;
-pub use acpi::{
-    interrupt::{InterruptModel, InterruptSourceOverride, IoApic, Polarity, TriggerMode},
-    Acpi,
-};
-use alloc::vec::Vec;
-use lazy_static::*;
-use spin::Mutex;
-pub struct AcpiTable {
-    inner: Acpi,
-}
-
-lazy_static! {
-    static ref ACPI_TABLE: Mutex<Option<AcpiTable>> = Mutex::default();
-}
-
-impl AcpiTable {
-    fn initialize_check() {
-        #[cfg(target_arch = "x86_64")]
-        {
-            let mut table = ACPI_TABLE.lock();
-            if table.is_none() {
-                *table = get_acpi_table().map(|x| AcpiTable { inner: x });
-            }
-        }
-    }
-    pub fn invalidate() {
-        *ACPI_TABLE.lock() = None;
-    }
-    pub fn get_ioapic() -> Vec<IoApic> {
-        Self::initialize_check();
-        let table = ACPI_TABLE.lock();
-        match &*table {
-            None => Vec::default(),
-            Some(table) => match table.inner.interrupt_model.as_ref().unwrap() {
-                InterruptModel::Apic(apic) => {
-                    apic.io_apics.iter().map(|x| IoApic { ..*x }).collect()
-                }
-                _ => Vec::default(),
-            },
-        }
-    }
-    pub fn get_interrupt_source_overrides() -> Vec<InterruptSourceOverride> {
-        Self::initialize_check();
-        let table = ACPI_TABLE.lock();
-        match &*table {
-            None => Vec::default(),
-            Some(table) => match table.inner.interrupt_model.as_ref().unwrap() {
-                InterruptModel::Apic(apic) => apic
-                    .interrupt_source_overrides
-                    .iter()
-                    .map(|x| InterruptSourceOverride {
-                        polarity: Self::clone_polarity(&x.polarity),
-                        trigger_mode: Self::clone_trigger_mode(&x.trigger_mode),
-                        ..*x
-                    })
-                    .collect(),
-                _ => Vec::default(),
-            },
-        }
-    }
-    fn clone_polarity(x: &Polarity) -> Polarity {
-        match x {
-            Polarity::SameAsBus => Polarity::SameAsBus,
-            Polarity::ActiveHigh => Polarity::ActiveHigh,
-            Polarity::ActiveLow => Polarity::ActiveLow,
-        }
-    }
-    fn clone_trigger_mode(x: &TriggerMode) -> TriggerMode {
-        match x {
-            TriggerMode::SameAsBus => TriggerMode::SameAsBus,
-            TriggerMode::Edge => TriggerMode::Edge,
-            TriggerMode::Level => TriggerMode::Level,
-        }
-    }
-}
--- a/kernel-hal-bare/src/arch/x86_64/interrupt.rs
+++ b/kernel-hal-bare/src/arch/x86_64/interrupt.rs
@ -1,376 +0,0 @@
-#![allow(dead_code)]
-#![allow(non_upper_case_globals)]
-
-use super::{acpi_table::*, phys_to_virt};
-use alloc::boxed::Box;
-use alloc::vec::Vec;
-use apic::IoApic;
-use spin::Mutex;
-use trapframe::TrapFrame;
-
-const IO_APIC_NUM_REDIRECTIONS: u8 = 120;
-const TABLE_SIZE: usize = 256;
-pub type InterruptHandle = Box<dyn Fn() + Send + Sync>;
-lazy_static! {
-    static ref IRQ_TABLE: Mutex<Vec<Option<InterruptHandle>>> = Default::default();
-}
-
-pub fn init() {
-    unsafe {
-        init_ioapic();
-    }
-    init_irq_table();
-    irq_add_handle(Timer + IRQ0, Box::new(timer));
-    irq_add_handle(Keyboard + IRQ0, Box::new(keyboard));
-    irq_add_handle(COM1 + IRQ0, Box::new(com1));
-    irq_enable_raw(Keyboard, Keyboard + IRQ0);
-    irq_enable_raw(COM1, COM1 + IRQ0);
-}
-
-fn init_irq_table() {
-    let mut table = IRQ_TABLE.lock();
-    for _ in 0..TABLE_SIZE {
-        table.push(None);
-    }
-}
-
-unsafe fn init_ioapic() {
-    for ioapic in AcpiTable::get_ioapic() {
-        info!("Ioapic found: {:#x?}", ioapic);
-        let mut ip = IoApic::new(phys_to_virt(ioapic.address as usize));
-        ip.disable_all();
-    }
-    let mut ip = IoApic::new(phys_to_virt(super::IOAPIC_ADDR));
-    ip.disable_all();
-}
-
-fn get_ioapic(irq: u32) -> Option<acpi::interrupt::IoApic> {
-    for i in AcpiTable::get_ioapic() {
-        let num_instr = core::cmp::min(
-            ioapic_maxinstr(i.address).unwrap(),
-            IO_APIC_NUM_REDIRECTIONS - 1,
-        );
-        if i.global_system_interrupt_base <= irq
-            && irq <= i.global_system_interrupt_base + num_instr as u32
-        {
-            return Some(i);
-        }
-    }
-    None
-}
-
-fn ioapic_controller(i: &acpi::interrupt::IoApic) -> IoApic {
-    unsafe { IoApic::new(phys_to_virt(i.address as usize)) }
-}
-
-#[no_mangle]
-pub extern "C" fn trap_handler(tf: &mut TrapFrame) {
-    trace!("Interrupt: {:#x} @ CPU{}", tf.trap_num, 0); // TODO 0 should replace in multi-core case
-    match tf.trap_num as u8 {
-        Breakpoint => breakpoint(),
-        DoubleFault => double_fault(tf),
-        PageFault => page_fault(tf),
-        IRQ0..=63 => irq_handle(tf.trap_num as u8),
-        _ => panic!("Unhandled interrupt {:x} {:#x?}", tf.trap_num, tf),
-    }
-}
-
-#[export_name = "hal_irq_handle"]
-pub fn irq_handle(irq: u8) {
-    use super::{LocalApic, XApic, LAPIC_ADDR};
-    let mut lapic = unsafe { XApic::new(phys_to_virt(LAPIC_ADDR)) };
-    lapic.eoi();
-    let table = IRQ_TABLE.lock();
-    match &table[irq as usize] {
-        Some(f) => f(),
-        None => panic!("unhandled external IRQ number: {}", irq),
-    }
-}
-
-#[export_name = "hal_ioapic_set_handle"]
-pub fn set_handle(global_irq: u32, handle: InterruptHandle) -> Option<u8> {
-    info!("set_handle irq={:#x?}", global_irq);
-    // if global_irq == 1 {
-    //     irq_add_handle(global_irq as u8 + IRQ0, handle);
-    //     return Some(global_irq as u8 + IRQ0);
-    // }
-    let ioapic_info = get_ioapic(global_irq)?;
-    let mut ioapic = ioapic_controller(&ioapic_info);
-    let offset = (global_irq - ioapic_info.global_system_interrupt_base) as u8;
-    let irq = ioapic.irq_vector(offset);
-    let new_handle = if global_irq == 0x1 {
-        Box::new(move || {
-            handle();
-            keyboard();
-        })
-    } else {
-        handle
-    };
-    irq_add_handle(irq, new_handle).map(|x| {
-        info!(
-            "irq_set_handle: mapping from {:#x?} to {:#x?}",
-            global_irq, x
-        );
-        ioapic.set_irq_vector(offset, x);
-        x
-    })
-}
-
-#[export_name = "hal_ioapic_reset_handle"]
-pub fn reset_handle(global_irq: u32) -> bool {
-    info!("reset_handle");
-    let ioapic_info = if let Some(x) = get_ioapic(global_irq) {
-        x
-    } else {
-        return false;
-    };
-    let mut ioapic = ioapic_controller(&ioapic_info);
-    let offset = (global_irq - ioapic_info.global_system_interrupt_base) as u8;
-    let irq = ioapic.irq_vector(offset);
-    if !irq_remove_handle(irq) {
-        ioapic.set_irq_vector(offset, 0);
-        true
-    } else {
-        false
-    }
-}
-
-/// Add a handle to IRQ table. Return the specified irq or an allocated irq on success
-#[export_name = "hal_irq_add_handle"]
-pub fn irq_add_handle(irq: u8, handle: InterruptHandle) -> Option<u8> {
-    info!("IRQ add handle {:#x?}", irq);
-    let mut table = IRQ_TABLE.lock();
-    // allocate a valid irq number
-    if irq == 0 {
-        let mut id = 0x20;
-        while id < table.len() {
-            if table[id].is_none() {
-                table[id] = Some(handle);
-                return Some(id as u8);
-            }
-            id += 1;
-        }
-        return None;
-    }
-    match table[irq as usize] {
-        Some(_) => None,
-        None => {
-            table[irq as usize] = Some(handle);
-            Some(irq)
-        }
-    }
-}
-
-#[export_name = "hal_irq_remove_handle"]
-pub fn irq_remove_handle(irq: u8) -> bool {
-    // TODO: ioapic redirection entries associated with this should be reset.
-    info!("IRQ remove handle {:#x?}", irq);
-    let irq = irq as usize;
-    let mut table = IRQ_TABLE.lock();
-    match table[irq] {
-        Some(_) => {
-            table[irq] = None;
-            false
-        }
-        None => true,
-    }
-}
-
-#[export_name = "hal_irq_allocate_block"]
-pub fn allocate_block(irq_num: u32) -> Option<(usize, usize)> {
-    info!("hal_irq_allocate_block: count={:#x?}", irq_num);
-    let irq_num = u32::next_power_of_two(irq_num) as usize;
-    let mut irq_start = 0x20;
-    let mut irq_cur = irq_start;
-    let mut table = IRQ_TABLE.lock();
-    while irq_cur < TABLE_SIZE && irq_cur < irq_start + irq_num {
-        if table[irq_cur].is_none() {
-            irq_cur += 1;
-        } else {
-            irq_start = (irq_cur - irq_cur % irq_num) + irq_num;
-            irq_cur = irq_start;
-        }
-    }
-    for i in irq_start..irq_start + irq_num {
-        table[i] = Some(Box::new(|| {}));
-    }
-    info!(
-        "hal_irq_allocate_block: start={:#x?} num={:#x?}",
-        irq_start, irq_num
-    );
-    Some((irq_start, irq_num))
-}
-
-#[export_name = "hal_irq_free_block"]
-pub fn free_block(irq_start: u32, irq_num: u32) {
-    let mut table = IRQ_TABLE.lock();
-    for i in irq_start..irq_start + irq_num {
-        table[i as usize] = None;
-    }
-}
-
-#[export_name = "hal_irq_overwrite_handler"]
-pub fn overwrite_handler(msi_id: u32, handle: Box<dyn Fn() + Send + Sync>) -> bool {
-    info!("IRQ overwrite handle {:#x?}", msi_id);
-    let mut table = IRQ_TABLE.lock();
-    let set = table[msi_id as usize].is_none();
-    table[msi_id as usize] = Some(handle);
-    set
-}
-
-#[export_name = "hal_irq_enable"]
-pub fn irq_enable(irq: u32) {
-    info!("irq_enable irq={:#x?}", irq);
-    // if irq == 1 {
-    //     irq_enable_raw(irq as u8, irq as u8 + IRQ0);
-    //     return;
-    // }
-    if let Some(x) = get_ioapic(irq) {
-        let mut ioapic = ioapic_controller(&x);
-        ioapic.enable((irq - x.global_system_interrupt_base) as u8, 0);
-    }
-}
-
-fn irq_enable_raw(irq: u8, vector: u8) {
-    info!("irq_enable_raw: irq={:#x?}, vector={:#x?}", irq, vector);
-    let mut ioapic = unsafe { IoApic::new(phys_to_virt(super::IOAPIC_ADDR)) };
-    ioapic.set_irq_vector(irq, vector);
-    ioapic.enable(irq, 0)
-}
-
-#[export_name = "hal_irq_disable"]
-pub fn irq_disable(irq: u32) {
-    info!("irq_disable");
-    if let Some(x) = get_ioapic(irq) {
-        let mut ioapic = ioapic_controller(&x);
-        ioapic.disable((irq - x.global_system_interrupt_base) as u8);
-    }
-}
-
-#[export_name = "hal_irq_configure"]
-pub fn irq_configure(
-    global_irq: u32,
-    vector: u8,
-    dest: u8,
-    level_trig: bool,
-    active_high: bool,
-) -> bool {
-    info!(
-        "irq_configure: irq={:#x?}, vector={:#x?}, dest={:#x?}, level_trig={:#x?}, active_high={:#x?}",
-        global_irq, vector, dest, level_trig, active_high
-    );
-    get_ioapic(global_irq)
-        .map(|x| {
-            let mut ioapic = ioapic_controller(&x);
-            ioapic.config(
-                (global_irq - x.global_system_interrupt_base) as u8,
-                vector,
-                dest,
-                level_trig,
-                active_high,
-                false, /* physical */
-                true,  /* mask */
-            );
-        })
-        .is_some()
-}
-
-#[export_name = "hal_irq_maxinstr"]
-pub fn ioapic_maxinstr(ioapic_addr: u32) -> Option<u8> {
-    let mut table = MAX_INSTR_TABLE.lock();
-    for (addr, v) in table.iter() {
-        if *addr == ioapic_addr as usize {
-            return Some(*v);
-        }
-    }
-    let mut ioapic = unsafe { IoApic::new(phys_to_virt(ioapic_addr as usize)) };
-    let v = ioapic.maxintr();
-    table.push((ioapic_addr as usize, v));
-    Some(v)
-}
-
-lazy_static! {
-    static ref MAX_INSTR_TABLE: Mutex<Vec<(usize, u8)>> = Mutex::default();
-}
-
-#[export_name = "hal_irq_isvalid"]
-pub fn irq_is_valid(irq: u32) -> bool {
-    trace!("irq_is_valid: irq={:#x?}", irq);
-    get_ioapic(irq).is_some()
-}
-
-fn breakpoint() {
-    panic!("\nEXCEPTION: Breakpoint");
-}
-
-fn double_fault(tf: &TrapFrame) {
-    panic!("\nEXCEPTION: Double Fault\n{:#x?}", tf);
-}
-
-fn page_fault(tf: &mut TrapFrame) {
-    panic!("\nEXCEPTION: Page Fault\n{:#x?}", tf);
-}
-
-fn timer() {
-    super::timer_tick();
-}
-
-fn com1() {
-    let c = super::COM1.lock().receive();
-    super::serial_put(c);
-}
-
-fn keyboard() {
-    use pc_keyboard::{DecodedKey, KeyCode};
-    if let Some(key) = super::keyboard::receive() {
-        match key {
-            DecodedKey::Unicode(c) => super::serial_put(c as u8),
-            DecodedKey::RawKey(code) => {
-                let s = match code {
-                    KeyCode::ArrowUp => "\u{1b}[A",
-                    KeyCode::ArrowDown => "\u{1b}[B",
-                    KeyCode::ArrowRight => "\u{1b}[C",
-                    KeyCode::ArrowLeft => "\u{1b}[D",
-                    _ => "",
-                };
-                for c in s.bytes() {
-                    super::serial_put(c);
-                }
-            }
-        }
-    }
-}
-
-// Reference: https://wiki.osdev.org/Exceptions
-const DivideError: u8 = 0;
-const Debug: u8 = 1;
-const NonMaskableInterrupt: u8 = 2;
-const Breakpoint: u8 = 3;
-const Overflow: u8 = 4;
-const BoundRangeExceeded: u8 = 5;
-const InvalidOpcode: u8 = 6;
-const DeviceNotAvailable: u8 = 7;
-const DoubleFault: u8 = 8;
-const CoprocessorSegmentOverrun: u8 = 9;
-const InvalidTSS: u8 = 10;
-const SegmentNotPresent: u8 = 11;
-const StackSegmentFault: u8 = 12;
-const GeneralProtectionFault: u8 = 13;
-const PageFault: u8 = 14;
-const FloatingPointException: u8 = 16;
-const AlignmentCheck: u8 = 17;
-const MachineCheck: u8 = 18;
-const SIMDFloatingPointException: u8 = 19;
-const VirtualizationException: u8 = 20;
-const SecurityException: u8 = 30;
-
-const IRQ0: u8 = 32;
-
-// IRQ
-const Timer: u8 = 0;
-const Keyboard: u8 = 1;
-const COM2: u8 = 3;
-const COM1: u8 = 4;
-const IDE: u8 = 14;
-const Error: u8 = 19;
-const Spurious: u8 = 31;
--- a/kernel-hal-bare/src/arch/x86_64/keyboard.rs
+++ b/kernel-hal-bare/src/arch/x86_64/keyboard.rs
@ -1,27 +0,0 @@
-use lazy_static::lazy_static;
-use pc_keyboard::{layouts, DecodedKey, HandleControl, Keyboard, ScancodeSet1};
-use spin::Mutex;
-use x86_64::instructions::port::Port;
-
-/// Receive character from keyboard
-/// Should be called on every interrupt
-pub fn receive() -> Option<DecodedKey> {
-    lazy_static! {
-        static ref KEYBOARD: Mutex<Keyboard<layouts::Us104Key, ScancodeSet1>> = Mutex::new(
-            Keyboard::new(layouts::Us104Key, ScancodeSet1, HandleControl::Ignore)
-        );
-    }
-
-    let mut keyboard = KEYBOARD.lock();
-    let mut data_port = Port::<u8>::new(0x60);
-    let mut status_port = Port::<u8>::new(0x64);
-
-    // Output buffer status = 1
-    if unsafe { status_port.read() } & 1 != 0 {
-        let scancode = unsafe { data_port.read() };
-        if let Ok(Some(key_event)) = keyboard.add_byte(scancode) {
-            return keyboard.process_keyevent(key_event);
-        }
-    }
-    None
-}
--- a/kernel-hal-bare/src/arch/x86_64/mod.rs
+++ b/kernel-hal-bare/src/arch/x86_64/mod.rs
@ -1,512 +0,0 @@
-use {
-    super::super::*,
-    acpi::{parse_rsdp, Acpi, AcpiHandler, PhysicalMapping},
-    alloc::{collections::VecDeque, vec::Vec},
-    apic::{LocalApic, XApic},
-    core::arch::x86_64::{__cpuid, _mm_clflush, _mm_mfence},
-    core::convert::TryFrom,
-    core::fmt::{Arguments, Write},
-    core::ptr::NonNull,
-    core::time::Duration,
-    git_version::git_version,
-    kernel_hal::{HalError, PageTableTrait, Result},
-    rcore_console::{Console, ConsoleOnGraphic, DrawTarget, Pixel, Rgb888, Size},
-    spin::Mutex,
-    uart_16550::SerialPort,
-    x86_64::{
-        instructions::port::Port,
-        registers::control::{Cr2, Cr3, Cr3Flags, Cr4, Cr4Flags},
-        structures::paging::{PageTableFlags as PTF, *},
-    },
-};
-
-mod acpi_table;
-mod interrupt;
-mod keyboard;
-
-/// Page Table
-#[repr(C)]
-pub struct PageTableImpl {
-    root_paddr: PhysAddr,
-}
-
-impl PageTableImpl {
-    #[export_name = "hal_pt_current"]
-    pub fn current() -> Self {
-        PageTableImpl {
-            root_paddr: Cr3::read().0.start_address().as_u64() as _,
-        }
-    }
-
-    /// Create a new `PageTable`.
-    #[allow(clippy::new_without_default)]
-    #[export_name = "hal_pt_new"]
-    pub fn new() -> Self {
-        let root_frame = Frame::alloc().expect("failed to alloc frame");
-        let root_vaddr = phys_to_virt(root_frame.paddr);
-        let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-        root.zero();
-        map_kernel(root_vaddr as _, frame_to_page_table(Cr3::read().0) as _);
-        trace!("create page table @ {:#x}", root_frame.paddr);
-        PageTableImpl {
-            root_paddr: root_frame.paddr,
-        }
-    }
-
-    fn get(&mut self) -> OffsetPageTable<'_> {
-        let root_vaddr = phys_to_virt(self.root_paddr);
-        let root = unsafe { &mut *(root_vaddr as *mut PageTable) };
-        let offset = x86_64::VirtAddr::new(phys_to_virt(0) as u64);
-        unsafe { OffsetPageTable::new(root, offset) }
-    }
-}
-
-impl PageTableTrait for PageTableImpl {
-    /// Map the page of `vaddr` to the frame of `paddr` with `flags`.
-    #[export_name = "hal_pt_map"]
-    fn map(&mut self, vaddr: VirtAddr, paddr: PhysAddr, flags: MMUFlags) -> Result<()> {
-        let mut pt = self.get();
-        unsafe {
-            pt.map_to_with_table_flags(
-                Page::<Size4KiB>::from_start_address(x86_64::VirtAddr::new(vaddr as u64)).unwrap(),
-                PhysFrame::from_start_address(x86_64::PhysAddr::new(paddr as u64)).unwrap(),
-                flags.to_ptf(),
-                PTF::PRESENT | PTF::WRITABLE | PTF::USER_ACCESSIBLE,
-                &mut FrameAllocatorImpl,
-            )
-            .unwrap()
-            .flush();
-        };
-        debug!(
-            "map: {:x?} -> {:x?}, flags={:?} in {:#x?}",
-            vaddr, paddr, flags, self.root_paddr
-        );
-        Ok(())
-    }
-
-    /// Unmap the page of `vaddr`.
-    #[export_name = "hal_pt_unmap"]
-    fn unmap(&mut self, vaddr: VirtAddr) -> Result<()> {
-        let mut pt = self.get();
-        let page =
-            Page::<Size4KiB>::from_start_address(x86_64::VirtAddr::new(vaddr as u64)).unwrap();
-        // This is a workaround to an issue in the x86-64 crate
-        // A page without PRESENT bit is not unmappable AND mapable
-        // So we add PRESENT bit here
-        unsafe {
-            pt.update_flags(page, PTF::PRESENT | PTF::NO_EXECUTE).ok();
-        }
-        match pt.unmap(page) {
-            Ok((_, flush)) => {
-                flush.flush();
-                trace!("unmap: {:x?} in {:#x?}", vaddr, self.root_paddr);
-            }
-            Err(mapper::UnmapError::PageNotMapped) => {
-                trace!(
-                    "unmap not mapped, skip: {:x?} in {:#x?}",
-                    vaddr,
-                    self.root_paddr
-                );
-                return Ok(());
-            }
-            Err(err) => {
-                debug!(
-                    "unmap failed: {:x?} err={:x?} in {:#x?}",
-                    vaddr, err, self.root_paddr
-                );
-                return Err(HalError);
-            }
-        }
-        Ok(())
-    }
-
-    /// Change the `flags` of the page of `vaddr`.
-    #[export_name = "hal_pt_protect"]
-    fn protect(&mut self, vaddr: VirtAddr, flags: MMUFlags) -> Result<()> {
-        let mut pt = self.get();
-        let page =
-            Page::<Size4KiB>::from_start_address(x86_64::VirtAddr::new(vaddr as u64)).unwrap();
-        if let Ok(flush) = unsafe { pt.update_flags(page, flags.to_ptf()) } {
-            flush.flush();
-        }
-        trace!("protect: {:x?}, flags={:?}", vaddr, flags);
-        Ok(())
-    }
-
-    /// Query the physical address which the page of `vaddr` maps to.
-    #[export_name = "hal_pt_query"]
-    fn query(&mut self, vaddr: VirtAddr) -> Result<PhysAddr> {
-        let pt = self.get();
-        let ret = pt
-            .translate_addr(x86_64::VirtAddr::new(vaddr as u64))
-            .map(|addr| addr.as_u64() as PhysAddr)
-            .ok_or(HalError);
-        trace!("query: {:x?} => {:x?}", vaddr, ret);
-        ret
-    }
-
-    /// Get the physical address of root page table.
-    #[export_name = "hal_pt_table_phys"]
-    fn table_phys(&self) -> PhysAddr {
-        self.root_paddr
-    }
-
-    // /// Activate this page table
-    // #[export_name = "hal_pt_activate"]
-    // fn activate(&self) {
-    //     unimplemented!()
-    // }
-}
-
-/// Set page table.
-///
-/// # Safety
-/// This function will set CR3 to `vmtoken`.
-pub unsafe fn set_page_table(vmtoken: usize) {
-    let frame = PhysFrame::containing_address(x86_64::PhysAddr::new(vmtoken as _));
-    if Cr3::read().0 == frame {
-        return;
-    }
-    Cr3::write(frame, Cr3Flags::empty());
-    debug!("set page_table @ {:#x}", vmtoken);
-}
-
-fn frame_to_page_table(frame: PhysFrame) -> *mut PageTable {
-    let vaddr = phys_to_virt(frame.start_address().as_u64() as usize);
-    vaddr as *mut PageTable
-}
-
-trait FlagsExt {
-    fn to_ptf(self) -> PTF;
-}
-
-impl FlagsExt for MMUFlags {
-    fn to_ptf(self) -> PTF {
-        let mut flags = PTF::empty();
-        if self.contains(MMUFlags::READ) {
-            flags |= PTF::PRESENT;
-        }
-        if self.contains(MMUFlags::WRITE) {
-            flags |= PTF::WRITABLE;
-        }
-        if !self.contains(MMUFlags::EXECUTE) {
-            flags |= PTF::NO_EXECUTE;
-        }
-        if self.contains(MMUFlags::USER) {
-            flags |= PTF::USER_ACCESSIBLE;
-        }
-        let cache_policy = (self.bits() & 3) as u32; // 最低三位用于储存缓存策略
-        match CachePolicy::try_from(cache_policy) {
-            Ok(CachePolicy::Cached) => {
-                flags.remove(PTF::WRITE_THROUGH);
-            }
-            Ok(CachePolicy::Uncached) | Ok(CachePolicy::UncachedDevice) => {
-                flags |= PTF::NO_CACHE | PTF::WRITE_THROUGH;
-            }
-            Ok(CachePolicy::WriteCombining) => {
-                flags |= PTF::NO_CACHE | PTF::WRITE_THROUGH;
-                // 当位于level=1时，页面更大，在1<<12位上（0x100）为1
-                // 但是bitflags里面没有这一位。由页表自行管理标记位去吧
-            }
-            Err(_) => unreachable!("invalid cache policy"),
-        }
-        flags
-    }
-}
-
-struct FrameAllocatorImpl;
-
-unsafe impl FrameAllocator<Size4KiB> for FrameAllocatorImpl {
-    fn allocate_frame(&mut self) -> Option<PhysFrame> {
-        Frame::alloc().map(|f| {
-            let paddr = x86_64::PhysAddr::new(f.paddr as u64);
-            PhysFrame::from_start_address(paddr).unwrap()
-        })
-    }
-}
-
-impl FrameDeallocator<Size4KiB> for FrameAllocatorImpl {
-    unsafe fn deallocate_frame(&mut self, frame: PhysFrame) {
-        Frame {
-            paddr: frame.start_address().as_u64() as usize,
-        }
-        .dealloc()
-    }
-}
-
-static CONSOLE: Mutex<Option<ConsoleOnGraphic<Framebuffer>>> = Mutex::new(None);
-
-struct Framebuffer {
-    width: u32,
-    height: u32,
-    buf: &'static mut [u32],
-}
-
-impl DrawTarget<Rgb888> for Framebuffer {
-    type Error = core::convert::Infallible;
-
-    fn draw_pixel(&mut self, item: Pixel<Rgb888>) -> core::result::Result<(), Self::Error> {
-        let idx = (item.0.x as u32 + item.0.y as u32 * self.width) as usize;
-        self.buf[idx] = unsafe { core::mem::transmute(item.1) };
-        Ok(())
-    }
-
-    fn size(&self) -> Size {
-        Size::new(self.width, self.height)
-    }
-}
-
-/// Initialize console on framebuffer.
-pub fn init_framebuffer(width: u32, height: u32, paddr: PhysAddr) {
-    let fb = Framebuffer {
-        width,
-        height,
-        buf: unsafe {
-            core::slice::from_raw_parts_mut(
-                phys_to_virt(paddr) as *mut u32,
-                (width * height) as usize,
-            )
-        },
-    };
-    let console = Console::on_frame_buffer(fb);
-    *CONSOLE.lock() = Some(console);
-}
-
-static COM1: Mutex<SerialPort> = Mutex::new(unsafe { SerialPort::new(0x3F8) });
-
-pub fn putfmt(fmt: Arguments) {
-    COM1.lock().write_fmt(fmt).unwrap();
-    if let Some(console) = CONSOLE.lock().as_mut() {
-        console.write_fmt(fmt).unwrap();
-    }
-}
-
-lazy_static! {
-    static ref STDIN: Mutex<VecDeque<u8>> = Mutex::new(VecDeque::new());
-    static ref STDIN_CALLBACK: Mutex<Vec<Box<dyn Fn() -> bool + Send + Sync>>> =
-        Mutex::new(Vec::new());
-}
-
-/// Put a char by serial interrupt handler.
-fn serial_put(mut x: u8) {
-    if x == b'\r' {
-        x = b'\n';
-    }
-    STDIN.lock().push_back(x);
-    STDIN_CALLBACK.lock().retain(|f| !f());
-}
-
-#[export_name = "hal_serial_set_callback"]
-pub fn serial_set_callback(callback: Box<dyn Fn() -> bool + Send + Sync>) {
-    STDIN_CALLBACK.lock().push(callback);
-}
-
-#[export_name = "hal_serial_read"]
-pub fn serial_read(buf: &mut [u8]) -> usize {
-    let mut stdin = STDIN.lock();
-    let len = stdin.len().min(buf.len());
-    for c in &mut buf[..len] {
-        *c = stdin.pop_front().unwrap();
-    }
-    len
-}
-
-#[export_name = "hal_serial_write"]
-pub fn serial_write(s: &str) {
-    putfmt(format_args!("{}", s));
-}
-
-/// Get TSC frequency.
-///
-/// WARN: This will be very slow on virtual machine since it uses CPUID instruction.
-fn tsc_frequency() -> u16 {
-    const DEFAULT: u16 = 2600;
-    if let Some(info) = raw_cpuid::CpuId::new().get_processor_frequency_info() {
-        let f = info.processor_base_frequency();
-        return if f == 0 { DEFAULT } else { f };
-    }
-    // FIXME: QEMU, AMD, VirtualBox
-    DEFAULT
-}
-
-#[export_name = "hal_timer_now"]
-pub fn timer_now() -> Duration {
-    let tsc = unsafe { core::arch::x86_64::_rdtsc() };
-    Duration::from_nanos(tsc * 1000 / unsafe { TSC_FREQUENCY } as u64)
-}
-
-fn timer_init() {
-    let mut lapic = unsafe { XApic::new(phys_to_virt(LAPIC_ADDR)) };
-    lapic.cpu_init();
-}
-
-#[export_name = "hal_apic_local_id"]
-pub fn apic_local_id() -> u8 {
-    let lapic = unsafe { XApic::new(phys_to_virt(LAPIC_ADDR)) };
-    lapic.id() as u8
-}
-
-const LAPIC_ADDR: usize = 0xfee0_0000;
-const IOAPIC_ADDR: usize = 0xfec0_0000;
-
-#[export_name = "hal_vdso_constants"]
-fn vdso_constants() -> VdsoConstants {
-    let tsc_frequency = unsafe { TSC_FREQUENCY };
-    let mut constants = VdsoConstants {
-        max_num_cpus: 1,
-        features: Features {
-            cpu: 0,
-            hw_breakpoint_count: 0,
-            hw_watchpoint_count: 0,
-        },
-        dcache_line_size: 0,
-        icache_line_size: 0,
-        ticks_per_second: tsc_frequency as u64 * 1_000_000,
-        ticks_to_mono_numerator: 1000,
-        ticks_to_mono_denominator: tsc_frequency as u32,
-        physmem: 0,
-        version_string_len: 0,
-        version_string: Default::default(),
-    };
-    constants.set_version_string(git_version!(
-        prefix = "git-",
-        args = ["--always", "--abbrev=40", "--dirty=-dirty"]
-    ));
-    constants
-}
-
-/// Initialize the HAL.
-pub fn init(config: Config) {
-    timer_init();
-    interrupt::init();
-    COM1.lock().init();
-    unsafe {
-        // enable global page
-        Cr4::update(|f| f.insert(Cr4Flags::PAGE_GLOBAL));
-        // store config
-        CONFIG = config;
-        // get tsc frequency
-        TSC_FREQUENCY = tsc_frequency();
-
-        // start multi-processors
-        fn ap_main() {
-            info!("processor {} started", apic_local_id());
-            unsafe {
-                trapframe::init();
-            }
-            timer_init();
-            let ap_fn = unsafe { CONFIG.ap_fn };
-            ap_fn()
-        }
-        fn stack_fn(pid: usize) -> usize {
-            // split and reuse the current stack
-            unsafe {
-                let mut stack: usize;
-                asm!("mov {}, rsp", out(reg) stack);
-                stack -= 0x4000 * pid;
-                stack
-            }
-        }
-        x86_smpboot::start_application_processors(ap_main, stack_fn, phys_to_virt);
-    }
-}
-
-/// Configuration of HAL.
-pub struct Config {
-    pub acpi_rsdp: u64,
-    pub smbios: u64,
-    pub ap_fn: fn() -> !,
-}
-
-#[export_name = "fetch_fault_vaddr"]
-pub fn fetch_fault_vaddr() -> VirtAddr {
-    Cr2::read().as_u64() as _
-}
-
-/// Get physical address of `acpi_rsdp` and `smbios` on x86_64.
-#[export_name = "hal_pc_firmware_tables"]
-pub fn pc_firmware_tables() -> (u64, u64) {
-    unsafe { (CONFIG.acpi_rsdp, CONFIG.smbios) }
-}
-
-static mut CONFIG: Config = Config {
-    acpi_rsdp: 0,
-    smbios: 0,
-    ap_fn: || unreachable!(),
-};
-
-static mut TSC_FREQUENCY: u16 = 2600;
-
-/// Build ACPI Table
-struct AcpiHelper {}
-impl AcpiHandler for AcpiHelper {
-    unsafe fn map_physical_region<T>(
-        &mut self,
-        physical_address: usize,
-        size: usize,
-    ) -> PhysicalMapping<T> {
-        #[allow(non_snake_case)]
-        let OFFSET = 0;
-        let page_start = physical_address / PAGE_SIZE;
-        let page_end = (physical_address + size + PAGE_SIZE - 1) / PAGE_SIZE;
-        PhysicalMapping::<T> {
-            physical_start: physical_address,
-            virtual_start: NonNull::new_unchecked(phys_to_virt(physical_address + OFFSET) as *mut T),
-            mapped_length: size,
-            region_length: PAGE_SIZE * (page_end - page_start),
-        }
-    }
-    fn unmap_physical_region<T>(&mut self, _region: PhysicalMapping<T>) {}
-}
-
-#[export_name = "hal_acpi_table"]
-pub fn get_acpi_table() -> Option<Acpi> {
-    #[cfg(target_arch = "x86_64")]
-    {
-        let mut handler = AcpiHelper {};
-        match unsafe { parse_rsdp(&mut handler, pc_firmware_tables().0 as usize) } {
-            Ok(table) => Some(table),
-            Err(info) => {
-                warn!("get_acpi_table error: {:#x?}", info);
-                None
-            }
-        }
-    }
-    #[cfg(not(target_arch = "x86_64"))]
-    None
-}
-
-/// IO Port in/out instruction
-#[export_name = "hal_outpd"]
-pub fn outpd(port: u16, value: u32) {
-    unsafe {
-        Port::new(port).write(value);
-    }
-}
-
-#[export_name = "hal_inpd"]
-pub fn inpd(port: u16) -> u32 {
-    unsafe { Port::new(port).read() }
-}
-
-/// Flush the physical frame.
-#[export_name = "hal_frame_flush"]
-pub fn frame_flush(target: PhysAddr) {
-    unsafe {
-        for paddr in (target..target + PAGE_SIZE).step_by(cacheline_size()) {
-            _mm_clflush(phys_to_virt(paddr) as *const u8);
-        }
-        _mm_mfence();
-    }
-}
-
-/// Get cache line size in bytes.
-fn cacheline_size() -> usize {
-    let leaf = unsafe { __cpuid(1).ebx };
-    (((leaf >> 8) & 0xff) << 3) as usize
-}
-
-#[export_name = "hal_current_pgtable"]
-pub fn current_page_table() -> usize {
-    PageTableImpl::current().root_paddr
-}
--- a/kernel-hal-bare/src/lib.rs
+++ b/kernel-hal-bare/src/lib.rs
@ -1,251 +0,0 @@
-//! Zircon HAL implementation for bare metal environment.
-//!
-//! This crate implements the following interfaces:
-//! - `hal_pt_new`
-//! - `hal_pt_map`
-//! - `hal_pt_unmap`
-//! - `hal_pt_protect`
-//! - `hal_pt_query`
-//! - `hal_pmem_read`
-//! - `hal_pmem_write`
-//!
-//! And you have to implement these interfaces in addition:
-//! - `hal_pt_map_kernel`
-//! - `hal_pmem_base`
-
-#![no_std]
-#![feature(asm)]
-#![feature(llvm_asm)]
-#![feature(global_asm)]
-#![feature(linkage)]
-//#![deny(warnings)]
-
-#[macro_use]
-extern crate log;
-
-extern crate alloc;
-
-#[macro_use]
-extern crate lazy_static;
-
-use alloc::boxed::Box;
-use core::time::Duration;
-use core::{
-    future::Future,
-    pin::Pin,
-    task::{Context, Poll},
-};
-use kernel_hal::defs::*;
-use kernel_hal::vdso::*;
-use kernel_hal::UserContext;
-use naive_timer::Timer;
-use spin::Mutex;
-
-pub mod arch;
-
-pub use self::arch::*;
-
-#[allow(improper_ctypes)]
-extern "C" {
-    fn hal_pt_map_kernel(pt: *mut u8, current: *const u8);
-    fn frame_alloc() -> Option<usize>;
-    fn hal_frame_alloc_contiguous(page_num: usize, align_log2: usize) -> Option<usize>;
-    fn frame_dealloc(paddr: &usize);
-    #[link_name = "hal_pmem_base"]
-    static PMEM_BASE: usize;
-}
-
-#[repr(C)]
-pub struct Thread {
-    thread: usize,
-}
-
-impl Thread {
-    #[export_name = "hal_thread_spawn"]
-    pub fn spawn(
-        future: Pin<Box<dyn Future<Output = ()> + Send + 'static>>,
-        vmtoken: usize,
-    ) -> Self {
-        struct PageTableSwitchWrapper {
-            inner: Mutex<Pin<Box<dyn Future<Output = ()> + Send>>>,
-            vmtoken: usize,
-        }
-        impl Future for PageTableSwitchWrapper {
-            type Output = ();
-            fn poll(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
-                unsafe {
-                    arch::set_page_table(self.vmtoken);
-                }
-                self.inner.lock().as_mut().poll(cx)
-            }
-        }
-
-        executor::spawn(PageTableSwitchWrapper {
-            inner: Mutex::new(future),
-            vmtoken,
-        });
-
-        Thread { thread: 0 }
-    }
-
-    #[export_name = "hal_thread_set_tid"]
-    pub fn set_tid(_tid: u64, _pid: u64) {}
-
-    #[export_name = "hal_thread_get_tid"]
-    pub fn get_tid() -> (u64, u64) {
-        (0, 0)
-    }
-}
-
-#[export_name = "hal_context_run"]
-pub fn context_run(context: &mut UserContext) {
-    context.run();
-}
-
-/// Map kernel for the new page table.
-///
-/// `pt` is a page-aligned pointer to the root page table.
-#[allow(clippy::not_unsafe_ptr_arg_deref)]
-pub fn map_kernel(pt: *mut u8, current: *const u8) {
-    unsafe {
-        hal_pt_map_kernel(pt, current);
-    }
-}
-
-#[repr(C)]
-pub struct Frame {
-    paddr: PhysAddr,
-}
-
-impl Frame {
-    #[export_name = "hal_frame_alloc"]
-    pub fn alloc() -> Option<Self> {
-        unsafe { frame_alloc().map(|paddr| Frame { paddr }) }
-    }
-
-    #[export_name = "hal_frame_dealloc"]
-    pub fn dealloc(&mut self) {
-        unsafe {
-            frame_dealloc(&self.paddr);
-        }
-    }
-
-    #[export_name = "hal_zero_frame_paddr"]
-    pub fn zero_frame_addr() -> PhysAddr {
-        #[repr(align(0x1000))]
-        struct Page([u8; PAGE_SIZE]);
-        static ZERO_PAGE: Page = Page([0u8; PAGE_SIZE]);
-        unsafe { ZERO_PAGE.0.as_ptr() as usize - PMEM_BASE }
-    }
-}
-
-pub fn phys_to_virt(paddr: PhysAddr) -> VirtAddr {
-    unsafe { PMEM_BASE + paddr }
-}
-
-pub fn virt_to_phys(vaddr: VirtAddr) -> PhysAddr {
-    unsafe { vaddr - PMEM_BASE }
-}
-
-/// Read physical memory from `paddr` to `buf`.
-#[export_name = "hal_pmem_read"]
-pub fn pmem_read(paddr: PhysAddr, buf: &mut [u8]) {
-    trace!("pmem_read: addr={:#x}, len={:#x}", paddr, buf.len());
-    unsafe {
-        (phys_to_virt(paddr) as *const u8).copy_to_nonoverlapping(buf.as_mut_ptr(), buf.len());
-    }
-}
-
-/// Write physical memory to `paddr` from `buf`.
-#[export_name = "hal_pmem_write"]
-pub fn pmem_write(paddr: PhysAddr, buf: &[u8]) {
-    trace!(
-        "pmem_write: addr={:#x}, len={:#x}, vaddr = {:#x}",
-        paddr,
-        buf.len(),
-        phys_to_virt(paddr)
-    );
-    unsafe {
-        buf.as_ptr()
-            .copy_to_nonoverlapping(phys_to_virt(paddr) as _, buf.len());
-    }
-}
-
-/// Zero physical memory at `[paddr, paddr + len)`
-#[export_name = "hal_pmem_zero"]
-pub fn pmem_zero(paddr: PhysAddr, len: usize) {
-    trace!("pmem_zero: addr={:#x}, len={:#x}", paddr, len);
-    unsafe {
-        core::ptr::write_bytes(phys_to_virt(paddr) as *mut u8, 0, len);
-    }
-}
-
-/// Copy content of `src` frame to `target` frame
-#[export_name = "hal_frame_copy"]
-pub fn frame_copy(src: PhysAddr, target: PhysAddr) {
-    trace!("frame_copy: {:#x} <- {:#x}", target, src);
-    unsafe {
-        let buf = phys_to_virt(src) as *const u8;
-        buf.copy_to_nonoverlapping(phys_to_virt(target) as _, PAGE_SIZE);
-    }
-}
-
-/// Zero `target` frame.
-#[export_name = "hal_frame_zero"]
-pub fn frame_zero_in_range(target: PhysAddr, start: usize, end: usize) {
-    assert!(start < PAGE_SIZE && end <= PAGE_SIZE);
-    trace!("frame_zero: {:#x?}", target);
-    unsafe {
-        core::ptr::write_bytes(phys_to_virt(target + start) as *mut u8, 0, end - start);
-    }
-}
-
-lazy_static! {
-    pub static ref NAIVE_TIMER: Mutex<Timer> = Mutex::new(Timer::default());
-}
-
-#[export_name = "hal_timer_set"]
-pub fn timer_set(deadline: Duration, callback: Box<dyn FnOnce(Duration) + Send + Sync>) {
-    NAIVE_TIMER.lock().add(deadline, callback);
-}
-
-#[export_name = "hal_timer_tick"]
-pub fn timer_tick() {
-    let now = arch::timer_now();
-    NAIVE_TIMER.lock().expire(now);
-}
-
-/// Initialize the HAL.
-pub fn init(config: Config) {
-    unsafe {
-        trapframe::init();
-    }
-
-    #[cfg(target_arch = "riscv64")]
-    trace!("hal dtb: {:#x}", config.dtb);
-
-    arch::init(config);
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[no_mangle]
-    extern "C" fn hal_pt_map_kernel(_pt: *mut u8, _current: *const u8) {
-        unimplemented!()
-    }
-
-    #[no_mangle]
-    extern "C" fn hal_frame_alloc() -> Option<PhysAddr> {
-        unimplemented!()
-    }
-
-    #[no_mangle]
-    extern "C" fn hal_frame_dealloc(_paddr: &PhysAddr) {
-        unimplemented!()
-    }
-
-    #[export_name = "hal_pmem_base"]
-    static PMEM_BASE: usize = 0;
-}
--- a/kernel-hal-unix/Cargo.toml
+++ b/kernel-hal-unix/Cargo.toml
@ -1,19 +0,0 @@
-[package]
-name = "kernel-hal-unix"
-version = "0.1.0"
-authors = ["Runji Wang <wangrunji0408@163.com>"]
-edition = "2018"
-description = "Kernel HAL implementation on Linux and macOS."
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
-[dependencies]
-log = "0.4"
-libc = "0.2"
-tempfile = "3"
-bitflags = "1.2"
-lazy_static = "1.4"
-kernel-hal = { path = "../kernel-hal" }
-async-std = "1.9"
-git-version = "0.3"
-trapframe = "0.8.0"
--- a/kernel-hal-unix/src/lib.rs
+++ b/kernel-hal-unix/src/lib.rs
@ -1,450 +0,0 @@
-#![feature(asm)]
-#![feature(linkage)]
-#![deny(warnings)]
-
-#[macro_use]
-extern crate log;
-
-extern crate alloc;
-
-use {
-    alloc::collections::VecDeque,
-    async_std::task_local,
-    core::{cell::Cell, future::Future, pin::Pin},
-    git_version::git_version,
-    kernel_hal::PageTableTrait,
-    lazy_static::lazy_static,
-    std::fmt::{Debug, Formatter},
-    std::fs::{File, OpenOptions},
-    std::io::Error,
-    std::os::unix::io::AsRawFd,
-    std::sync::Mutex,
-    std::time::{Duration, SystemTime},
-    tempfile::tempdir,
-};
-
-pub use kernel_hal::defs::*;
-use kernel_hal::vdso::*;
-pub use kernel_hal::*;
-use std::io::Read;
-pub use trapframe::syscall_fn_entry as syscall_entry;
-
-#[cfg(target_os = "macos")]
-include!("macos.rs");
-
-#[repr(C)]
-pub struct Thread {
-    thread: usize,
-}
-
-impl Thread {
-    #[export_name = "hal_thread_spawn"]
-    pub fn spawn(
-        future: Pin<Box<dyn Future<Output = ()> + Send + 'static>>,
-        _vmtoken: usize,
-    ) -> Self {
-        async_std::task::spawn(future);
-        Thread { thread: 0 }
-    }
-
-    #[export_name = "hal_thread_set_tid"]
-    pub fn set_tid(tid: u64, pid: u64) {
-        TID.with(|x| x.set(tid));
-        PID.with(|x| x.set(pid));
-    }
-
-    #[export_name = "hal_thread_get_tid"]
-    pub fn get_tid() -> (u64, u64) {
-        (TID.with(|x| x.get()), PID.with(|x| x.get()))
-    }
-}
-
-task_local! {
-    static TID: Cell<u64> = Cell::new(0);
-    static PID: Cell<u64> = Cell::new(0);
-}
-
-#[export_name = "hal_context_run"]
-unsafe fn context_run(context: &mut UserContext) {
-    context.run_fncall();
-}
-
-/// Page Table
-#[repr(C)]
-pub struct PageTable {
-    table_phys: PhysAddr,
-}
-
-impl PageTable {
-    /// Create a new `PageTable`.
-    #[allow(clippy::new_without_default)]
-    #[export_name = "hal_pt_new"]
-    pub fn new() -> Self {
-        PageTable { table_phys: 0 }
-    }
-}
-
-impl PageTableTrait for PageTable {
-    /// Map the page of `vaddr` to the frame of `paddr` with `flags`.
-    #[export_name = "hal_pt_map"]
-    fn map(&mut self, vaddr: VirtAddr, paddr: PhysAddr, flags: MMUFlags) -> Result<()> {
-        debug_assert!(page_aligned(vaddr));
-        debug_assert!(page_aligned(paddr));
-        let prot = flags.to_mmap_prot();
-        mmap(FRAME_FILE.as_raw_fd(), paddr, PAGE_SIZE, vaddr, prot);
-        Ok(())
-    }
-
-    /// Unmap the page of `vaddr`.
-    #[export_name = "hal_pt_unmap"]
-    fn unmap(&mut self, vaddr: VirtAddr) -> Result<()> {
-        self.unmap_cont(vaddr, 1)
-    }
-
-    /// Change the `flags` of the page of `vaddr`.
-    #[export_name = "hal_pt_protect"]
-    fn protect(&mut self, vaddr: VirtAddr, flags: MMUFlags) -> Result<()> {
-        debug_assert!(page_aligned(vaddr));
-        let prot = flags.to_mmap_prot();
-        let ret = unsafe { libc::mprotect(vaddr as _, PAGE_SIZE, prot) };
-        assert_eq!(ret, 0, "failed to mprotect: {:?}", Error::last_os_error());
-        Ok(())
-    }
-
-    /// Query the physical address which the page of `vaddr` maps to.
-    #[export_name = "hal_pt_query"]
-    fn query(&mut self, vaddr: VirtAddr) -> Result<PhysAddr> {
-        debug_assert!(page_aligned(vaddr));
-        unimplemented!()
-    }
-
-    /// Get the physical address of root page table.
-    #[export_name = "hal_pt_table_phys"]
-    fn table_phys(&self) -> PhysAddr {
-        self.table_phys
-    }
-
-    #[export_name = "hal_pt_unmap_cont"]
-    fn unmap_cont(&mut self, vaddr: VirtAddr, pages: usize) -> Result<()> {
-        if pages == 0 {
-            return Ok(());
-        }
-        debug_assert!(page_aligned(vaddr));
-        let ret = unsafe { libc::munmap(vaddr as _, PAGE_SIZE * pages) };
-        assert_eq!(ret, 0, "failed to munmap: {:?}", Error::last_os_error());
-        Ok(())
-    }
-}
-
-#[repr(C)]
-pub struct PhysFrame {
-    paddr: PhysAddr,
-}
-
-impl Debug for PhysFrame {
-    fn fmt(&self, f: &mut Formatter<'_>) -> core::result::Result<(), std::fmt::Error> {
-        write!(f, "PhysFrame({:#x})", self.paddr)
-    }
-}
-
-lazy_static! {
-    static ref AVAILABLE_FRAMES: Mutex<VecDeque<usize>> =
-        Mutex::new((PAGE_SIZE..PMEM_SIZE).step_by(PAGE_SIZE).collect());
-}
-
-impl PhysFrame {
-    #[export_name = "hal_frame_alloc"]
-    pub fn alloc() -> Option<Self> {
-        let ret = AVAILABLE_FRAMES
-            .lock()
-            .unwrap()
-            .pop_front()
-            .map(|paddr| PhysFrame { paddr });
-        trace!("frame alloc: {:?}", ret);
-        ret
-    }
-    #[export_name = "hal_zero_frame_paddr"]
-    pub fn zero_frame_addr() -> PhysAddr {
-        0
-    }
-}
-
-impl Drop for PhysFrame {
-    #[export_name = "hal_frame_dealloc"]
-    fn drop(&mut self) {
-        trace!("frame dealloc: {:?}", self);
-        AVAILABLE_FRAMES.lock().unwrap().push_back(self.paddr);
-    }
-}
-
-fn phys_to_virt(paddr: PhysAddr) -> VirtAddr {
-    /// Map physical memory from here.
-    const PMEM_BASE: VirtAddr = 0x8_0000_0000;
-
-    PMEM_BASE + paddr
-}
-
-/// Ensure physical memory are mmapped and accessible.
-fn ensure_mmap_pmem() {
-    FRAME_FILE.as_raw_fd();
-}
-
-/// Read physical memory from `paddr` to `buf`.
-#[export_name = "hal_pmem_read"]
-pub fn pmem_read(paddr: PhysAddr, buf: &mut [u8]) {
-    trace!("pmem read: paddr={:#x}, len={:#x}", paddr, buf.len());
-    assert!(paddr + buf.len() <= PMEM_SIZE);
-    ensure_mmap_pmem();
-    unsafe {
-        (phys_to_virt(paddr) as *const u8).copy_to_nonoverlapping(buf.as_mut_ptr(), buf.len());
-    }
-}
-
-/// Write physical memory to `paddr` from `buf`.
-#[export_name = "hal_pmem_write"]
-pub fn pmem_write(paddr: PhysAddr, buf: &[u8]) {
-    trace!("pmem write: paddr={:#x}, len={:#x}", paddr, buf.len());
-    assert!(paddr + buf.len() <= PMEM_SIZE);
-    ensure_mmap_pmem();
-    unsafe {
-        buf.as_ptr()
-            .copy_to_nonoverlapping(phys_to_virt(paddr) as _, buf.len());
-    }
-}
-
-/// Zero physical memory at `[paddr, paddr + len)`
-#[export_name = "hal_pmem_zero"]
-pub fn pmem_zero(paddr: PhysAddr, len: usize) {
-    trace!("pmem_zero: addr={:#x}, len={:#x}", paddr, len);
-    assert!(paddr + len <= PMEM_SIZE);
-    ensure_mmap_pmem();
-    unsafe {
-        core::ptr::write_bytes(phys_to_virt(paddr) as *mut u8, 0, len);
-    }
-}
-
-/// Copy content of `src` frame to `target` frame
-#[export_name = "hal_frame_copy"]
-pub fn frame_copy(src: PhysAddr, target: PhysAddr) {
-    trace!("frame_copy: {:#x} <- {:#x}", target, src);
-    assert!(src + PAGE_SIZE <= PMEM_SIZE && target + PAGE_SIZE <= PMEM_SIZE);
-    ensure_mmap_pmem();
-    unsafe {
-        let buf = phys_to_virt(src) as *const u8;
-        buf.copy_to_nonoverlapping(phys_to_virt(target) as _, PAGE_SIZE);
-    }
-}
-
-/// Flush the physical frame.
-#[export_name = "hal_frame_flush"]
-pub fn frame_flush(_target: PhysAddr) {
-    // do nothing
-}
-
-const PAGE_SIZE: usize = 0x1000;
-
-fn page_aligned(x: VirtAddr) -> bool {
-    x % PAGE_SIZE == 0
-}
-
-const PMEM_SIZE: usize = 0x4000_0000; // 1GiB
-
-lazy_static! {
-    static ref FRAME_FILE: File = create_pmem_file();
-}
-
-fn create_pmem_file() -> File {
-    let dir = tempdir().expect("failed to create pmem dir");
-    let path = dir.path().join("pmem");
-
-    // workaround on macOS to avoid permission denied.
-    // see https://jiege.ch/software/2020/02/07/macos-mmap-exec/ for analysis on this problem.
-    #[cfg(target_os = "macos")]
-    std::mem::forget(dir);
-
-    let file = OpenOptions::new()
-        .read(true)
-        .write(true)
-        .create(true)
-        .open(&path)
-        .expect("failed to create pmem file");
-    file.set_len(PMEM_SIZE as u64)
-        .expect("failed to resize file");
-    trace!("create pmem file: path={:?}, size={:#x}", path, PMEM_SIZE);
-    let prot = libc::PROT_READ | libc::PROT_WRITE;
-    mmap(file.as_raw_fd(), 0, PMEM_SIZE, phys_to_virt(0), prot);
-    file
-}
-
-/// Mmap frame file `fd` to `vaddr`.
-fn mmap(fd: libc::c_int, offset: usize, len: usize, vaddr: VirtAddr, prot: libc::c_int) {
-    // workaround on macOS to write text section.
-    #[cfg(target_os = "macos")]
-    let prot = if prot & libc::PROT_EXEC != 0 {
-        prot | libc::PROT_WRITE
-    } else {
-        prot
-    };
-
-    let ret = unsafe {
-        let flags = libc::MAP_SHARED | libc::MAP_FIXED;
-        libc::mmap(vaddr as _, len, prot, flags, fd, offset as _)
-    } as usize;
-    trace!(
-        "mmap file: fd={}, offset={:#x}, len={:#x}, vaddr={:#x}, prot={:#b}",
-        fd,
-        offset,
-        len,
-        vaddr,
-        prot,
-    );
-    assert_eq!(ret, vaddr, "failed to mmap: {:?}", Error::last_os_error());
-}
-
-trait FlagsExt {
-    fn to_mmap_prot(&self) -> libc::c_int;
-}
-
-impl FlagsExt for MMUFlags {
-    fn to_mmap_prot(&self) -> libc::c_int {
-        let mut flags = 0;
-        if self.contains(MMUFlags::READ) {
-            flags |= libc::PROT_READ;
-        }
-        if self.contains(MMUFlags::WRITE) {
-            flags |= libc::PROT_WRITE;
-        }
-        if self.contains(MMUFlags::EXECUTE) {
-            flags |= libc::PROT_EXEC;
-        }
-        flags
-    }
-}
-
-lazy_static! {
-    static ref STDIN: Mutex<VecDeque<u8>> = Mutex::new(VecDeque::new());
-    static ref STDIN_CALLBACK: Mutex<Vec<Box<dyn Fn() -> bool + Send + Sync>>> =
-        Mutex::new(Vec::new());
-}
-
-/// Put a char by serial interrupt handler.
-fn serial_put(x: u8) {
-    STDIN.lock().unwrap().push_back(x);
-    STDIN_CALLBACK.lock().unwrap().retain(|f| !f());
-}
-
-#[export_name = "hal_serial_set_callback"]
-pub fn serial_set_callback(callback: Box<dyn Fn() -> bool + Send + Sync>) {
-    STDIN_CALLBACK.lock().unwrap().push(callback);
-}
-
-#[export_name = "hal_serial_read"]
-pub fn serial_read(buf: &mut [u8]) -> usize {
-    let mut stdin = STDIN.lock().unwrap();
-    let len = stdin.len().min(buf.len());
-    for c in &mut buf[..len] {
-        *c = stdin.pop_front().unwrap();
-    }
-    len
-}
-
-/// Output a char to console.
-#[export_name = "hal_serial_write"]
-pub fn serial_write(s: &str) {
-    eprint!("{}", s);
-}
-
-/// Get current time.
-#[export_name = "hal_timer_now"]
-pub fn timer_now() -> Duration {
-    SystemTime::now()
-        .duration_since(SystemTime::UNIX_EPOCH)
-        .unwrap()
-}
-
-/// Set a new timer.
-///
-/// After `deadline`, the `callback` will be called.
-#[export_name = "hal_timer_set"]
-pub fn timer_set(deadline: Duration, callback: Box<dyn FnOnce(Duration) + Send + Sync>) {
-    std::thread::spawn(move || {
-        let now = timer_now();
-        if deadline > now {
-            std::thread::sleep(deadline - now);
-        }
-        callback(timer_now());
-    });
-}
-
-#[export_name = "hal_vdso_constants"]
-pub fn vdso_constants() -> VdsoConstants {
-    let tsc_frequency = 3000u16;
-    let mut constants = VdsoConstants {
-        max_num_cpus: 1,
-        features: Features {
-            cpu: 0,
-            hw_breakpoint_count: 0,
-            hw_watchpoint_count: 0,
-        },
-        dcache_line_size: 0,
-        icache_line_size: 0,
-        ticks_per_second: tsc_frequency as u64 * 1_000_000,
-        ticks_to_mono_numerator: 1000,
-        ticks_to_mono_denominator: tsc_frequency as u32,
-        physmem: PMEM_SIZE as u64,
-        version_string_len: 0,
-        version_string: Default::default(),
-    };
-    constants.set_version_string(git_version!(
-        prefix = "git-",
-        args = ["--always", "--abbrev=40", "--dirty=-dirty"]
-    ));
-    constants
-}
-
-#[export_name = "hal_current_pgtable"]
-pub fn current_page_table() -> usize {
-    0
-}
-
-/// Initialize the HAL.
-///
-/// This function must be called at the beginning.
-pub fn init() {
-    #[cfg(target_os = "macos")]
-    unsafe {
-        register_sigsegv_handler();
-    }
-    // spawn a thread to read stdin
-    // TODO: raw mode
-    std::thread::spawn(|| {
-        for i in std::io::stdin().bytes() {
-            serial_put(i.unwrap());
-        }
-    });
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    /// A valid virtual address base to mmap.
-    const VBASE: VirtAddr = 0x2_00000000;
-
-    #[test]
-    fn map_unmap() {
-        let mut pt = PageTable::new();
-        let flags = MMUFlags::READ | MMUFlags::WRITE;
-        // map 2 pages to 1 frame
-        pt.map(VBASE, 0x1000, flags).unwrap();
-        pt.map(VBASE + 0x1000, 0x1000, flags).unwrap();
-
-        unsafe {
-            const MAGIC: usize = 0xdead_beaf;
-            (VBASE as *mut usize).write(MAGIC);
-            assert_eq!(((VBASE + 0x1000) as *mut usize).read(), MAGIC);
-        }
-
-        pt.unmap(VBASE + 0x1000).unwrap();
-    }
-}
--- a/kernel-hal-unix/src/macos.rs
+++ b/kernel-hal-unix/src/macos.rs
@ -1,93 +0,0 @@
-/// Register signal handler for SIGSEGV (Segmentation Fault).
-///
-///
-unsafe fn register_sigsegv_handler() {
-    let sa = libc::sigaction {
-        sa_sigaction: handler as usize,
-        sa_flags: libc::SA_SIGINFO,
-        sa_mask: 0,
-    };
-    libc::sigaction(libc::SIGSEGV, &sa, core::ptr::null_mut());
-
-    #[repr(C)]
-    struct Ucontext {
-        uc_onstack: i32,
-        uc_sigmask: u32,
-        uc_stack: [u32; 5],
-        uc_link: usize,
-        uc_mcsize: usize,
-        uc_mcontext: *const Mcontext,
-    }
-
-    #[repr(C)]
-    #[derive(Debug)]
-    struct Mcontext {
-        trapno: u16,
-        cpu: u16,
-        err: u32,
-        faultvaddr: u64,
-        rax: u64,
-        rbx: u64,
-        rcx: u64,
-        rdx: u64,
-        rdi: u64,
-        rsi: u64,
-        rbp: u64,
-        rsp: u64,
-        r8: u64,
-        r9: u64,
-        r10: u64,
-        r11: u64,
-        r12: u64,
-        r13: u64,
-        r14: u64,
-        r15: u64,
-        rip: u64,
-        rflags: u64,
-        cs: u64,
-        fs: u64,
-        gs: u64,
-    }
-
-    /// Signal handler for when code tries to use %fs.
-    ///
-    /// Ref: https://github.com/NuxiNL/cloudabi-utils/blob/38d845bc5cc6fcf441fe0d3c2433f9298cbeb760/src/libemulator/tls.c#L30-L53
-    unsafe extern "C" fn handler(
-        _sig: libc::c_int,
-        _si: *const libc::siginfo_t,
-        uc: *const Ucontext,
-    ) {
-        let mut rip = (*(*uc).uc_mcontext).rip as *mut u8;
-        // skip data16 prefix
-        while rip.read() == 0x66 {
-            rip = rip.add(1);
-        }
-        match rip.read() {
-            // Instruction starts with 0x64, meaning it tries to access %fs. By
-            // changing the first byte to 0x65, it uses %gs instead.
-            0x64 => rip.write(0x65),
-            // Instruction has already been patched up, but it may well be the
-            // case that this was done by another CPU core. There is nothing
-            // else we can do than return and try again. This may cause us to
-            // get stuck indefinitely.
-            0x65 => {}
-            // Segmentation violation on an instruction that does not try to
-            // access %fs. Reset the handler to its default action, so that the
-            // segmentation violation is rethrown.
-            _ => {
-                // switch back to kernel gs
-                asm!(
-                    "
-                    mov rdi, gs:48
-                    syscall
-                    ",
-                    in("eax") 0x3000003,
-                    out("rdi") _,
-                    out("rcx") _,
-                    out("r11") _,
-                );
-                panic!("catch SIGSEGV: {:#x?}", *(*uc).uc_mcontext);
-            }
-        }
-    }
-}
--- a/kernel-hal/Cargo.toml
+++ b/kernel-hal/Cargo.toml
@ -1,17 +1,66 @@
 [package]
 name = "kernel-hal"
 version = "0.1.0"
-authors = ["Runji Wang <wangrunji0408@163.com>"]
+authors = [
+    "Runji Wang <wangrunji0408@163.com>",
+    "Yuekai Jia <equation618@gmail.com>",
+]
 edition = "2018"
 description = "Kernel HAL interface definations."

 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

-[dependencies]
-bitflags = "1.2"
-trapframe = "0.8.0"
-numeric-enum-macro = "0.2"
-acpi = "1.1"
+[features]
+default = ["libos"]
+smp = []
+libos = [
+    "nix",
+    "tempfile",
+    "async-std",
+    "bitmap-allocator",
+    "zcore-drivers/mock",
+]
+graphic = ["zcore-drivers/graphic"]

-#[patch.crates-io]
-#trapframe = { path = "/home/xly/rust/arch-lib/trapframe-rs" }
+loopback = []
+
+[dependencies]
+log = "0.4"
+spin = "0.9"
+cfg-if = "1.0"
+bitflags = "1.3"
+trapframe = "0.9.0"
+git-version = "0.3"
+numeric-enum-macro = "0.2"
+lazy_static = { version = "1.4", features = ["spin_no_std"] }
+zcore-drivers = { path = "../drivers", features = ["virtio"] }
+lock = { git = "https://github.com/DeathWish5/kernel-sync", rev = "01b2e70" }
+smoltcp = { git = "https://github.com/smoltcp-rs/smoltcp", rev = "35e833e3", default-features = false, features = ["log", "alloc", "verbose", "proto-ipv4", "proto-ipv6", "proto-igmp", "medium-ip", "medium-ethernet", "socket-raw", "socket-udp", "socket-tcp", "socket-icmp", "async"] }
+
+# LibOS mode
+[target.'cfg(not(target_os = "none"))'.dependencies]
+nix = { version = "0.23", optional = true }
+tempfile = { version = "3", optional = true }
+async-std = { version = "1.10", optional = true }
+bitmap-allocator = { git = "https://github.com/rcore-os/bitmap-allocator.git", rev = "88e871a5", optional = true }
+
+# Bare-metal mode
+[target.'cfg(target_os = "none")'.dependencies]
+executor = { git = "https://github.com/DeathWish5/PreemptiveScheduler", rev = "3b04ba4" }
+naive-timer = "0.2.0"
+
+# All mode on x86_64
+[target.'cfg(target_arch = "x86_64")'.dependencies]
+x86 = "0.46"
+x86_64 = "0.14"
+
+# Bare-metal mode on x86_64
+[target.'cfg(all(target_os = "none", target_arch = "x86_64"))'.dependencies]
+uefi = "0.11"
+raw-cpuid = "9.0"
+x86-smpboot = { git = "https://github.com/rcore-os/x86-smpboot", rev = "1069df3" }
+x2apic = "0.4"
+
+# Bare-metal mode on riscv64
+[target.'cfg(all(target_os = "none", target_arch = "riscv64"))'.dependencies]
+riscv = "0.8"
--- a/kernel-hal/src/bare/arch/riscv/config.rs
+++ b/kernel-hal/src/bare/arch/riscv/config.rs
@ -0,0 +1,8 @@
+//! Kernel configuration.
+
+/// Kernel configuration passed by kernel when calls [`crate::primary_init_early()`].
+#[derive(Debug)]
+pub struct KernelConfig {
+    pub phys_to_virt_offset: usize,
+    pub dtb_paddr: usize,
+}
--- a/kernel-hal/src/bare/arch/riscv/cpu.rs
+++ b/kernel-hal/src/bare/arch/riscv/cpu.rs
@ -0,0 +1,23 @@
+//! CPU information.
+use crate::utils::init_once::InitOnce;
+
+pub(super) static CPU_FREQ_MHZ: InitOnce<u16> = InitOnce::new_with_default(10);
+
+hal_fn_impl! {
+    impl mod crate::hal_fn::cpu {
+        fn cpu_id() -> u8 {
+            let mut cpu_id;
+            unsafe { core::arch::asm!("mv {0}, tp", out(reg) cpu_id) };
+            cpu_id
+        }
+
+        fn cpu_frequency() -> u16 {
+            *CPU_FREQ_MHZ
+        }
+
+        fn reset() -> ! {
+            info!("shutdown...");
+            super::sbi::shutdown()
+        }
+    }
+}
--- a/kernel-hal/src/bare/arch/riscv/drivers.rs
+++ b/kernel-hal/src/bare/arch/riscv/drivers.rs
@ -0,0 +1,113 @@
+use alloc::boxed::Box;
+use alloc::format;
+
+use zcore_drivers::builder::{DevicetreeDriverBuilder, IoMapper};
+use zcore_drivers::irq::riscv::ScauseIntCode;
+use zcore_drivers::uart::BufferedUart;
+use zcore_drivers::{Device, DeviceResult};
+
+use crate::common::vm::GenericPageTable;
+use crate::{drivers, mem::phys_to_virt, CachePolicy, MMUFlags, PhysAddr, VirtAddr};
+
+struct IoMapperImpl;
+
+impl IoMapper for IoMapperImpl {
+    fn query_or_map(&self, paddr: PhysAddr, size: usize) -> Option<VirtAddr> {
+        let vaddr = phys_to_virt(paddr);
+        let mut pt = super::vm::kernel_page_table().lock();
+        if let Ok((paddr_mapped, _, _)) = pt.query(vaddr) {
+            if paddr_mapped == paddr {
+                Some(vaddr)
+            } else {
+                warn!(
+                    "IoMapper::query_or_map: not linear mapping: vaddr={:#x}, paddr={:#x}",
+                    vaddr, paddr_mapped
+                );
+                None
+            }
+        } else {
+            let size = crate::addr::align_up(size);
+            let flags = MMUFlags::READ
+                | MMUFlags::WRITE
+                | MMUFlags::HUGE_PAGE
+                | MMUFlags::from_bits_truncate(CachePolicy::UncachedDevice as usize);
+            if let Err(err) = pt.map_cont(vaddr, size, paddr, flags) {
+                warn!(
+                    "IoMapper::query_or_map: failed to map {:#x?} => {:#x}, flags={:?}: {:?}",
+                    vaddr..vaddr + size,
+                    paddr,
+                    flags,
+                    err
+                );
+                None
+            } else {
+                Some(vaddr)
+            }
+        }
+    }
+}
+
+/// Initialize device drivers.
+pub(super) fn init() -> DeviceResult {
+    // prase DTB and probe devices
+    let dev_list =
+        DevicetreeDriverBuilder::new(phys_to_virt(crate::KCONFIG.dtb_paddr), IoMapperImpl)?
+            .build()?;
+    // add drivers
+    for dev in dev_list.into_iter() {
+        if let Device::Uart(uart) = dev {
+            drivers::add_device(Device::Uart(BufferedUart::new(uart)));
+        } else {
+            drivers::add_device(dev);
+        }
+    }
+
+    #[cfg(not(feature = "loopback"))]
+    {
+        use alloc::sync::Arc;
+        use zcore_drivers::bus::pci;
+        let pci_devs = pci::init(Some(Arc::new(IoMapperImpl)))?;
+        for d in pci_devs.into_iter() {
+            drivers::add_device(d);
+        }
+    }
+
+    intc_init()?;
+
+    #[cfg(feature = "graphic")]
+    if let Some(display) = drivers::all_display().first() {
+        crate::console::init_graphic_console(display.clone());
+        if display.need_flush() {
+            // TODO: support nested interrupt to render in time
+            crate::thread::spawn(crate::common::future::DisplayFlushFuture::new(display, 30));
+        }
+    }
+
+    #[cfg(feature = "loopback")]
+    {
+        use crate::net;
+        net::init();
+    }
+
+    Ok(())
+}
+
+pub(super) fn intc_init() -> DeviceResult {
+    let irq = drivers::all_irq()
+        .find(format!("riscv-intc-cpu{}", crate::cpu::cpu_id()).as_str())
+        .expect("IRQ device 'riscv-intc' not initialized!");
+    // register soft interrupts handler
+    irq.register_handler(
+        ScauseIntCode::SupervisorSoft as _,
+        Box::new(super::trap::super_soft),
+    )?;
+    // register timer interrupts handler
+    irq.register_handler(
+        ScauseIntCode::SupervisorTimer as _,
+        Box::new(super::trap::super_timer),
+    )?;
+    irq.unmask(ScauseIntCode::SupervisorSoft as _)?;
+    irq.unmask(ScauseIntCode::SupervisorTimer as _)?;
+
+    Ok(())
+}
--- a/Show More
+++ b/Show More